Проверка условия
Пучкование даёт пучок абелевых групп
Результат расчёта
Установлено
Исходные параметры
Что определяем
0070: — абелев пучок на : абелев предпучок, чей предпучок множеств — пучок
Исходные факты
— предпучок множеств на : правило, сопоставляющее каждому открытому множество , а вложениям — отображения ограничения с и
f: fx: xкаждое несёт структуру абелевой группы, и все отображения ограничения — гомоморфизмы абелевых групп
f: f— пучковизация предпучка : сечения над суть согласованные семейства ростков (Sheaves, раздел 007X), с каноническим отображением
g: fsharpf: f
Пакет: Когомологии пучков по The Stacks Project: пучок, пучковизация, H^i(X, F) как производный функтор глобальных сечений, вялые пучки — вне юрисдикции государства — доктрина
Дополнительные сведения
- Сохранить доказательство
- Да
Исходные данные · JSON
{
"args": [
"urn:case:stacks:sh:fsharp",
"urn:case:stacks:sh:x"
],
"facts": [
{
"args": [
"urn:case:stacks:sh:f",
"urn:case:stacks:sh:x"
],
"predicate": "presheaf_of_sets_on"
},
{
"args": [
"urn:case:stacks:sh:f"
],
"predicate": "abelian_group_structure"
},
{
"args": [
"urn:case:stacks:sh:fsharp",
"urn:case:stacks:sh:f"
],
"predicate": "plus_construction"
}
],
"kind": "truth",
"legalTime": "2026-09-06",
"package": "stacks-sheaf-cohomology",
"predicate": "abelian_sheaf_on",
"proof": true
}Почему такой результатПрименённые правила и условия
Путь вывода6 шагов
- 1факт дела
— предпучок множеств на : правило, сопоставляющее каждому открытому множество , а вложениям — отображения ограничения с и
f: urn:case:stacks:sh:f; x: urn:case:stacks:sh:x
- 2факт дела
каждое несёт структуру абелевой группы, и все отображения ограничения — гомоморфизмы абелевых групп
f: urn:case:stacks:sh:f
- 3правило
006K: абелев предпучок на — предпучок множеств , у которого каждое — абелева группа, а все ограничения — гомоморфизмы групп
f: urn:case:stacks:sh:f; x: urn:case:stacks:sh:x
тег 006K
Идентификатор
urn:stacks:clir:sheaf-cohomology#abelian_presheaf_on/sufficient - 4факт дела
— пучковизация предпучка : сечения над суть согласованные семейства ростков (Sheaves, раздел 007X), с каноническим отображением
g: urn:case:stacks:sh:fsharp; f: urn:case:stacks:sh:f
- 5правило
0085: для абелева предпучка на есть единственная структура абелева пучка, при которой — морфизм абелевых предпучков
0070: — абелев пучок на : абелев предпучок, чей предпучок множеств — пучок: f: urn:case:stacks:sh:fsharp; x: urn:case:stacks:sh:x
тег 0085
Идентификатор
urn:stacks:clir:sheaf-cohomology#SheafifyAbelianPresheaf - 6запрос
Вычисление запроса
проверено движком: 3 · факт дела: 3 · Полный граф: 10 узлов
Шаги сохранённого доказательства от фактов дела к ответу. Формулы показаны как записаны в норме, с подставленными значениями; страница ничего не пересчитывает.
Основание этого ответа
Правила из сохранённой цепочки доказательства ответа.
Когомологии пучков по The Stacks Project: пучок, пучковизация, H^i(X, F) как производный функтор глобальных сечений, вялые пучки — вне юрисдикции государства — доктрина
0085: для абелева предпучка на есть единственная структура абелева пучка, при которой — морфизм абелевых предпучков
Идентификатор
urn:stacks:clir:sheaf-cohomology#SheafifyAbelianPresheaf006K: абелев предпучок на — предпучок множеств , у которого каждое — абелева группа, а все ограничения — гомоморфизмы групп
Идентификатор
urn:stacks:clir:sheaf-cohomology#abelian_presheaf_on/sufficient
Другие правила расчёта3
Применены в общем расчёте, но не входят в цепочку доказательства этого ответа.
Когомологии пучков по The Stacks Project: пучок, пучковизация, H^i(X, F) как производный функтор глобальных сечений, вялые пучки — вне юрисдикции государства — доктрина
0FKS с 01AD: у всякого абелева пучка на есть резольвента Годемана вялыми пучками
Идентификатор
urn:stacks:clir:sheaf-cohomology#GodementResolutionExists007Y: предпучок — пучок
Идентификатор
urn:stacks:clir:sheaf-cohomology#SheafificationIsSheaf0080: для предпучка множеств всякое отображение в пучок единственным образом проходит через
Идентификатор
urn:stacks:clir:sheaf-cohomology#SheafifyUniversal
Вывод по запросу
0070: — абелев пучок на : абелев предпучок, чей предпучок множеств — пучок
f: fsharpx: x
Другие выводы4
006K: абелев предпучок на — предпучок множеств , у которого каждое — абелева группа, а все ограничения — гомоморфизмы групп
f: fx: x— пучок множеств на
f: fsharpx: x0FKS: у пучка есть функториальная резольвента вялыми пучками (резольвента Годемана)
f: fsharp0080: всякое отображение в пучок множеств единственным образом раскладывается как
f: fg: fsharp
| f | x |
|---|---|
| urn:case:stacks:sh:f | x |
| f | x |
|---|---|
| urn:case:stacks:sh:fsharp | x |
| f | x |
|---|---|
| urn:case:stacks:sh:fsharp | x |
| f |
|---|
| urn:case:stacks:sh:fsharp |
| f | g |
|---|---|
| urn:case:stacks:sh:f | urn:case:stacks:sh:fsharp |
Скрыто выведенных фактов: 0. В кратком ответе движок оставляет относящиеся к вопросу; полный перечень — в JSON расчёта ниже.
Что способно поразить вывод3 правил
- 1правило
006T: предпучок, у которого согласованные семейства сечений не склеиваются, — не пучок
Чего не хватает
- 006T, существование: для всякого открытого покрытия и сечений , согласованных на пересечениях, существует с fsharpНе установленоименно этого не хватает
- — предпучок множеств на : правило, сопоставляющее каждому открытому множество , а вложениям — отображения ограничения с и fsharp, xНе установленоименно этого не хватает
Источник: тег 006T
Идентификатор
urn:stacks:clir:sheaf-cohomology#NotSheafByFailedGluing - 2правило
006T: предпучок, в котором склеенное сечение не единственно, — не пучок
Чего не хватает
- 006T, единственность: сечение определяется своими ограничениями на открытое покрытиеfsharpНе установленоименно этого не хватает
- — предпучок множеств на : правило, сопоставляющее каждому открытому множество , а вложениям — отображения ограничения с и fsharp, xНе установленоименно этого не хватает
Источник: тег 006T
Идентификатор
urn:stacks:clir:sheaf-cohomology#NotSheafByFailedUniqueness - 3правило
006T: предпучок, опровергнутый открытым покрытием, — не пучок множеств на
Чего не хватает
- — не пучок на : условие 006T провалено на некотором открытом покрытииfsharp, xНе установленоименно этого не хватает
Источник: тег 006T
Идентификатор
urn:stacks:clir:sheaf-cohomology#NotSheafByRefutingCovering
Перечислены правила, чья голова отвечает вопросу, и их невыполненные посылки. Отсутствие факта не означает его опровержения.
Граф доказательств
Узлы доказательств: 10 · assertion 3, rule_application 5, constraint_check 1, query_evaluation 1
assertion · urn:proof:assert:urn:mcp:case#fact-1
- attributes
- assertion
- fact-1
- conclusion
- Аргументы
- Идентификатор
- f
- Тип
- entity_ref
- Идентификатор
- x
- Тип
- entity_ref
- Тип
- literal
- Знак
- positive
- Условие
- presheaf_of_sets_on
- evidence
- —
- Идентификатор
- fact-1
- Тип
- assertion
- Посылки
- —
- sourceAnchors
- —
assertion · urn:proof:assert:urn:mcp:case#fact-2
- attributes
- assertion
- fact-2
- conclusion
- Аргументы
- Идентификатор
- f
- Тип
- entity_ref
- Тип
- literal
- Знак
- positive
- Условие
- abelian_group_structure
- evidence
- —
- Идентификатор
- fact-2
- Тип
- assertion
- Посылки
- —
- sourceAnchors
- —
rule_application · urn:proof:apply:abelian_presheaf_on/sufficient:7889dfde746f9ab8807eab1f0add64a003fcaf203a97fcbecbe717dcc9c62dae
- attributes
- definition
- concept
- abelian_presheaf_on
- mode
- exact
- part
- sufficient
- conclusion
- Аргументы
- Идентификатор
- f
- Тип
- entity_ref
- Идентификатор
- x
- Тип
- entity_ref
- Тип
- literal
- Знак
- positive
- Условие
- abelian_presheaf_on
- evidence
- —
- Идентификатор
- 7889dfde746f9ab8807eab1f0add64a003fcaf203a97fcbecbe717dcc9c62dae
- Тип
- rule_application
- Посылки
- fact-1
- fact-2
- Правило
- abelian_presheaf_on/sufficient
- sourceAnchors
- —
- substitution
- v0
- Идентификатор
- f
- Тип
- entity_ref
- v1
- Идентификатор
- x
- Тип
- entity_ref
assertion · urn:proof:assert:urn:mcp:case#fact-3
- attributes
- assertion
- fact-3
- conclusion
- Аргументы
- Идентификатор
- fsharp
- Тип
- entity_ref
- Идентификатор
- f
- Тип
- entity_ref
- Тип
- literal
- Знак
- positive
- Условие
- plus_construction
- evidence
- —
- Идентификатор
- fact-3
- Тип
- assertion
- Посылки
- —
- sourceAnchors
- —
rule_application · urn:proof:apply:SheafificationIsSheaf:eaf6a9aa2d0b4a500dc473cfcc0200ff61ea9beb9b8b4c6f79c6657450c8afd0
- attributes
- —
- conclusion
- Аргументы
- Идентификатор
- fsharp
- Тип
- entity_ref
- Идентификатор
- x
- Тип
- entity_ref
- Тип
- literal
- Знак
- positive
- Условие
- sheaf_of_sets_on
- evidence
- —
- Идентификатор
- eaf6a9aa2d0b4a500dc473cfcc0200ff61ea9beb9b8b4c6f79c6657450c8afd0
- Тип
- rule_application
- Посылки
- fact-1
- fact-3
- Правило
- SheafificationIsSheaf
- sourceAnchors
- —
- substitution
- v0
- Идентификатор
- fsharp
- Тип
- entity_ref
- v1
- Идентификатор
- f
- Тип
- entity_ref
- v2
- Идентификатор
- x
- Тип
- entity_ref
rule_application · urn:proof:apply:SheafifyAbelianPresheaf:71a0ffc581c9d38c8ed87215ff07264a41e544119fcaff883a64071bf550b44a
- attributes
- —
- conclusion
- Аргументы
- Идентификатор
- fsharp
- Тип
- entity_ref
- Идентификатор
- x
- Тип
- entity_ref
- Тип
- literal
- Знак
- positive
- Условие
- abelian_sheaf_on
- evidence
- —
- Идентификатор
- 71a0ffc581c9d38c8ed87215ff07264a41e544119fcaff883a64071bf550b44a
- Тип
- rule_application
- Посылки
- 7889dfde746f9ab8807eab1f0add64a003fcaf203a97fcbecbe717dcc9c62dae
- fact-3
- Правило
- SheafifyAbelianPresheaf
- sourceAnchors
- —
- substitution
- v0
- Идентификатор
- fsharp
- Тип
- entity_ref
- v1
- Идентификатор
- f
- Тип
- entity_ref
- v2
- Идентификатор
- x
- Тип
- entity_ref
rule_application · urn:proof:apply:GodementResolutionExists:c3529a34c74fd31d4c672c809a4ecb778e70d8af01b9f392fdbc88127dbc32ff
- attributes
- —
- conclusion
- Аргументы
- Идентификатор
- fsharp
- Тип
- entity_ref
- Тип
- literal
- Знак
- positive
- Условие
- has_flasque_resolution
- evidence
- —
- Идентификатор
- c3529a34c74fd31d4c672c809a4ecb778e70d8af01b9f392fdbc88127dbc32ff
- Тип
- rule_application
- Посылки
- 71a0ffc581c9d38c8ed87215ff07264a41e544119fcaff883a64071bf550b44a
- Правило
- GodementResolutionExists
- sourceAnchors
- —
- substitution
- v0
- Идентификатор
- fsharp
- Тип
- entity_ref
- v1
- Идентификатор
- x
- Тип
- entity_ref
rule_application · urn:proof:apply:SheafifyUniversal:08e13163bd01f4b2580ae4fbd1215e62a1d2eacd896fef56d26ee23b484b96a7
- attributes
- —
- conclusion
- Аргументы
- Идентификатор
- f
- Тип
- entity_ref
- Идентификатор
- fsharp
- Тип
- entity_ref
- Тип
- literal
- Знак
- positive
- Условие
- universal_among_maps_to_sheaves
- evidence
- —
- Идентификатор
- 08e13163bd01f4b2580ae4fbd1215e62a1d2eacd896fef56d26ee23b484b96a7
- Тип
- rule_application
- Посылки
- fact-1
- fact-3
- Правило
- SheafifyUniversal
- sourceAnchors
- —
- substitution
- v0
- Идентификатор
- fsharp
- Тип
- entity_ref
- v1
- Идентификатор
- f
- Тип
- entity_ref
- v2
- Идентификатор
- x
- Тип
- entity_ref
constraint_check · urn:proof:constraint:abelian_presheaf_on/necessary:d9e2399cdfdd101b1998dce82c1b5e113c483740c26e7506b19c323888ffd3c4
- attributes
- —
- conclusion
- constraint
- abelian_presheaf_on/necessary
- requirementStatus
- Установлено
- Статус расчёта
- Соблюдено
- triggerStatus
- Соблюдено
- evidence
- —
- Идентификатор
- d9e2399cdfdd101b1998dce82c1b5e113c483740c26e7506b19c323888ffd3c4
- Тип
- constraint_check
- Посылки
- 7889dfde746f9ab8807eab1f0add64a003fcaf203a97fcbecbe717dcc9c62dae
- fact-1
- fact-2
- sourceAnchors
- —
- substitution
- v0
- Идентификатор
- f
- Тип
- entity_ref
- v1
- Идентификатор
- x
- Тип
- entity_ref
query_evaluation · urn:proof:query:mcp
- attributes
- —
- conclusion
- literal
- Аргументы
- Идентификатор
- fsharp
- Тип
- entity_ref
- Идентификатор
- x
- Тип
- entity_ref
- Тип
- literal
- Знак
- positive
- Условие
- abelian_sheaf_on
- truthStatus
- Установлено
- evidence
- —
- Идентификатор
- mcp
- Тип
- query_evaluation
- Посылки
- 71a0ffc581c9d38c8ed87215ff07264a41e544119fcaff883a64071bf550b44a
- sourceAnchors
- —
Идентификаторы календаря и доказательства
- Ссылка на доказательство
- mcp
Исходное обоснование · JSON
{
"derived": [
"abelian_presheaf_on(urn:case:stacks:sh:f, urn:case:stacks:sh:x)",
"sheaf_of_sets_on(urn:case:stacks:sh:fsharp, urn:case:stacks:sh:x)",
"abelian_sheaf_on(urn:case:stacks:sh:fsharp, urn:case:stacks:sh:x)",
"has_flasque_resolution(urn:case:stacks:sh:fsharp)",
"universal_among_maps_to_sheaves(urn:case:stacks:sh:f, urn:case:stacks:sh:fsharp)"
],
"derivedOmitted": 0,
"evaluation": {
"proofGraph": {
"nodes": [
{
"attributes": {
"assertion": "urn:mcp:case#fact-1"
},
"conclusion": {
"args": [
{
"id": "urn:case:stacks:sh:f",
"kind": "entity_ref"
},
{
"id": "urn:case:stacks:sh:x",
"kind": "entity_ref"
}
],
"kind": "literal",
"polarity": "positive",
"predicate": "urn:stacks:clir:sheaf-cohomology#presheaf_of_sets_on"
},
"evidence": [],
"id": "urn:proof:assert:urn:mcp:case#fact-1",
"kind": "assertion",
"premises": [],
"sourceAnchors": []
},
{
"attributes": {
"assertion": "urn:mcp:case#fact-2"
},
"conclusion": {
"args": [
{
"id": "urn:case:stacks:sh:f",
"kind": "entity_ref"
}
],
"kind": "literal",
"polarity": "positive",
"predicate": "urn:stacks:clir:sheaf-cohomology#abelian_group_structure"
},
"evidence": [],
"id": "urn:proof:assert:urn:mcp:case#fact-2",
"kind": "assertion",
"premises": [],
"sourceAnchors": []
},
{
"attributes": {
"definition": {
"concept": "urn:stacks:clir:sheaf-cohomology#abelian_presheaf_on",
"mode": "exact",
"part": "sufficient"
}
},
"conclusion": {
"args": [
{
"id": "urn:case:stacks:sh:f",
"kind": "entity_ref"
},
{
"id": "urn:case:stacks:sh:x",
"kind": "entity_ref"
}
],
"kind": "literal",
"polarity": "positive",
"predicate": "urn:stacks:clir:sheaf-cohomology#abelian_presheaf_on"
},
"evidence": [],
"id": "urn:proof:apply:abelian_presheaf_on/sufficient:7889dfde746f9ab8807eab1f0add64a003fcaf203a97fcbecbe717dcc9c62dae",
"kind": "rule_application",
"premises": [
"urn:proof:assert:urn:mcp:case#fact-1",
"urn:proof:assert:urn:mcp:case#fact-2"
],
"rule": "urn:stacks:clir:sheaf-cohomology#abelian_presheaf_on/sufficient",
"sourceAnchors": [],
"substitution": {
"v0": {
"id": "urn:case:stacks:sh:f",
"kind": "entity_ref"
},
"v1": {
"id": "urn:case:stacks:sh:x",
"kind": "entity_ref"
}
}
},
{
"attributes": {
"assertion": "urn:mcp:case#fact-3"
},
"conclusion": {
"args": [
{
"id": "urn:case:stacks:sh:fsharp",
"kind": "entity_ref"
},
{
"id": "urn:case:stacks:sh:f",
"kind": "entity_ref"
}
],
"kind": "literal",
"polarity": "positive",
"predicate": "urn:stacks:clir:sheaf-cohomology#plus_construction"
},
"evidence": [],
"id": "urn:proof:assert:urn:mcp:case#fact-3",
"kind": "assertion",
"premises": [],
"sourceAnchors": []
},
{
"attributes": {},
"conclusion": {
"args": [
{
"id": "urn:case:stacks:sh:fsharp",
"kind": "entity_ref"
},
{
"id": "urn:case:stacks:sh:x",
"kind": "entity_ref"
}
],
"kind": "literal",
"polarity": "positive",
"predicate": "urn:stacks:clir:sheaf-cohomology#sheaf_of_sets_on"
},
"evidence": [],
"id": "urn:proof:apply:SheafificationIsSheaf:eaf6a9aa2d0b4a500dc473cfcc0200ff61ea9beb9b8b4c6f79c6657450c8afd0",
"kind": "rule_application",
"premises": [
"urn:proof:assert:urn:mcp:case#fact-1",
"urn:proof:assert:urn:mcp:case#fact-3"
],
"rule": "urn:stacks:clir:sheaf-cohomology#SheafificationIsSheaf",
"sourceAnchors": [],
"substitution": {
"v0": {
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}ИсточникиФрагментов: 7
tag/006K
Когомологии пучков по The Stacks Project: пучок, пучковизация, H^i(X, F) как производный функтор глобальных сечений, вялые пучки — вне юрисдикции государства — доктрина
Let be a topological space.
A presheaf of abelian groups on or an abelian presheaf over is a presheaf of sets such that for each open the set is endowed with the structure of an abelian group, and such that all restriction maps are homomorphisms of abelian groups, see Lemma above.
A morphism of abelian presheaves over is a morphism of presheaves of sets which induces a homomorphism of abelian groups for every open .
The category of presheaves of abelian groups on is denoted .
Исходные данные · JSON
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"text": "\\begin{definition}\n\\label{definition-abelian-presheaves}\nLet $X$ be a topological space.\n\\begin{enumerate}\n\\item A {\\it presheaf of abelian groups on $X$} or an\n{\\it abelian presheaf over $X$}\nis a presheaf of sets $\\mathcal{F}$ such that for each open\n$U \\subset X$ the set $\\mathcal{F}(U)$ is endowed with\nthe structure of an abelian group, and such that all restriction\nmaps $\\rho^U_V$ are homomorphisms of abelian groups, see\nLemma \\ref{lemma-abelian-presheaves} above.\n\\item A {\\it morphism of abelian presheaves over $X$}\n$\\varphi : \\mathcal{F} \\to \\mathcal{G}$ is a morphism of presheaves\nof sets which induces\na homomorphism of abelian groups $\\mathcal{F}(U) \\to \\mathcal{G}(U)$\nfor every open $U \\subset X$.\n\\item The category of presheaves of abelian groups on $X$ is denoted\n$\\textit{PAb}(X)$.\n\\end{enumerate}\n\\end{definition}"
}
]
}tag/006T
Когомологии пучков по The Stacks Project: пучок, пучковизация, H^i(X, F) как производный функтор глобальных сечений, вялые пучки — вне юрисдикции государства — доктрина
Let be a topological space.
A sheaf of sets on is a presheaf of sets which satisfies the following additional property: Given any open covering and any collection of sections , such that
there exists a unique section such that for all .
A morphism of sheaves of sets is simply a morphism of presheaves of sets.
The category of sheaves of sets on is denoted .
Исходные данные · JSON
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"edition": "urn:stacks:clir:sheaf-cohomology#STACKS_SHEAVES_MASTER",
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"text": "\\begin{definition}\n\\label{definition-sheaf}\nLet $X$ be a topological space.\n\\begin{enumerate}\n\\item A {\\it sheaf $\\mathcal{F}$ of sets on $X$} is a presheaf\nof sets which satisfies the following additional property: Given\nany open covering $U = \\bigcup_{i \\in I} U_i$ and any collection\nof sections $s_i \\in \\mathcal{F}(U_i)$, $i \\in I$ such that\n$\\forall i, j\\in I$\n$$\ns_i|_{U_i \\cap U_j} = s_j|_{U_i \\cap U_j}\n$$\nthere exists a unique section $s \\in \\mathcal{F}(U)$ such that\n$s_i = s|_{U_i}$ for all $i \\in I$.\n\\item A {\\it morphism of sheaves of sets} is simply a\nmorphism of presheaves of sets.\n\\item The category of sheaves of sets on $X$ is denoted\n$\\Sh(X)$.\n\\end{enumerate}\n\\end{definition}"
}
]
}tag/007Y
Когомологии пучков по The Stacks Project: пучок, пучковизация, H^i(X, F) как производный функтор глобальных сечений, вялые пучки — вне юрисдикции государства — доктрина
The presheaf is a sheaf.
Исходные данные · JSON
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"language": "en",
"status": "official",
"text": "\\begin{lemma}\n\\label{lemma-sheafification-sheaf}\nThe presheaf $\\mathcal{F}^{\\#}$ is a sheaf.\n\\end{lemma}"
}
]
}tag/0080
Когомологии пучков по The Stacks Project: пучок, пучковизация, H^i(X, F) как производный функтор глобальных сечений, вялые пучки — вне юрисдикции государства — доктрина
Let be a presheaf of sets on . Any map into a sheaf of sets factors uniquely as .
Исходные данные · JSON
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"contentHash": "sha256:9b004386054af3ebceab40302636bc759c8a1b7c732a3984765235c76fc000c4",
"edition": "urn:stacks:clir:sheaf-cohomology#STACKS_SHEAVES_MASTER",
"fragmentKind": "lemma",
"id": "urn:stacks:clir:sheaf-cohomology#ST_0080",
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"language": "en",
"status": "official",
"text": "\\begin{lemma}\n\\label{lemma-sheafify-universal}\nLet $\\mathcal{F}$ be a presheaf of sets on $X$.\nAny map $\\mathcal{F} \\to \\mathcal{G}$ into a sheaf of sets\nfactors uniquely as\n$\\mathcal{F} \\to \\mathcal{F}^\\# \\to \\mathcal{G}$.\n\\end{lemma}"
}
]
}tag/0085
Когомологии пучков по The Stacks Project: пучок, пучковизация, H^i(X, F) как производный функтор глобальных сечений, вялые пучки — вне юрисдикции государства — доктрина
Let be a topological space. Let be an abelian presheaf on . Then there exists a unique structure of abelian sheaf on such that is a morphism of abelian presheaves. Moreover, the following adjointness property holds
Исходные данные · JSON
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"contentHash": "sha256:63fafe60d647e15c855184db7359f8c2ead35af2af5d43260bed141fe4d3a8d0",
"edition": "urn:stacks:clir:sheaf-cohomology#STACKS_SHEAVES_MASTER",
"fragmentKind": "lemma",
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"status": "official",
"text": "\\begin{lemma}\n\\label{lemma-sheafify-abelian-presheaf}\nLet $X$ be a topological space.\nLet $\\mathcal{F}$ be an abelian presheaf on $X$.\nThen there exists a unique structure of\nabelian sheaf on $\\mathcal{F}^\\#$ such that\n$\\mathcal{F} \\to \\mathcal{F}^\\#$ is a morphism\nof abelian presheaves. Moreover, the following adjointness\nproperty holds\n$$\n\\Mor_{\\textit{PAb}(X)}(\\mathcal{F}, i(\\mathcal{G}))\n=\n\\Mor_{\\textit{Ab}(X)}(\\mathcal{F}^\\#, \\mathcal{G}).\n$$\n\\end{lemma}"
}
]
}tag/01AD
Когомологии пучков по The Stacks Project: пучок, пучковизация, H^i(X, F) как производный функтор глобальных сечений, вялые пучки — вне юрисдикции государства — доктрина
Introduction
In this chapter we work out basic notions of sheaves of modules. This in particular includes the case of abelian sheaves, since these may be viewed as sheaves of -modules. Basic references are , and . We work out what happens for sheaves of modules on ringed topoi in another chapter (see Modules on Sites, Section ), although there we will mostly just duplicate the discussion from this chapter.
Исходные данные · JSON
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"contentHash": "sha256:d0262bf7656850a1933eef167a360437aa2bb6436e57461a3d23de09e8cc8ef3",
"edition": "urn:stacks:clir:sheaf-cohomology#STACKS_MODULES_MASTER",
"fragmentKind": "section",
"id": "urn:stacks:clir:sheaf-cohomology#ST_01AD",
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"language": "en",
"status": "official",
"text": "\\section{Introduction}\n\\label{section-introduction}\n\n\\noindent\nIn this chapter we work out basic notions of sheaves of modules.\nThis in particular includes the case of abelian sheaves, since\nthese may be viewed as sheaves of $\\underline{\\mathbf{Z}}$-modules.\nBasic references are \\cite{FAC}, \\cite{EGA} and \\cite{SGA4}.\n\n\\medskip\\noindent\nWe work out what happens for sheaves of modules on ringed topoi\nin another chapter (see\nModules on Sites, Section \\ref{sites-modules-section-introduction}),\nalthough there we will mostly just duplicate the discussion\nfrom this chapter."
}
]
}tag/0FKS
Когомологии пучков по The Stacks Project: пучок, пучковизация, H^i(X, F) как производный функтор глобальных сечений, вялые пучки — вне юрисдикции государства — доктрина
Let be a ringed space. For every sheaf of -modules there is a resolution
functorial in such that each term is a flasque -module and such that for all the map
is a homotopy equivalence in the category of complexes of -modules.
Исходные данные · JSON
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"text": "\\begin{lemma}\n\\label{lemma-godement-resolution}\nLet $(X, \\mathcal{O}_X)$ be a ringed space. For every sheaf of\n$\\mathcal{O}_X$-modules $\\mathcal{F}$ there is a resolution\n$$\n0 \\to\n\\mathcal{F} \\to\nf_*f^*\\mathcal{F} \\to\nf_*f^*f_*f^*\\mathcal{F} \\to\nf_*f^*f_*f^*f_*f^*\\mathcal{F} \\to \\ldots\n$$\nfunctorial in $\\mathcal{F}$ such that each term\n$f_*f^* \\ldots f_*f^*\\mathcal{F}$ is a flasque\n$\\mathcal{O}_X$-module and such that for all $x \\in X$ the\nmap\n$$\n\\mathcal{F}_x[0] \\to \\Big(\n(f_*f^*\\mathcal{F})_x \\to\n(f_*f^*f_*f^*\\mathcal{F})_x \\to\n(f_*f^*f_*f^*f_*f^*\\mathcal{F})_x \\to \\ldots\n\\Big)\n$$\nis a homotopy equivalence in the category of complexes\nof $\\mathcal{O}_{X, x}$-modules.\n\\end{lemma}"
}
]
}Пакеты в снимке
- Когомологии пучков по The Stacks Project: пучок, пучковизация, H^i(X, F) как производный функтор глобальных сечений, вялые пучки — вне юрисдикции государства — доктрина
Технические данныеПолный ответ, параметры и контрольные суммы
- Статус расчёта
- COMPUTED
Полный ответ движка
Полный машинный результат · JSON
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Блок слишком большой для встроенного просмотра. Он целиком включён в JSON документа — без сокращений.
Скачать JSON ↓JSON · расчёты, источники и точные данные
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Исходные данные · JSON
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