Cote n° 4 · pages 1–10
· 25 displayed formulas · Torsion en cohomologie cristalline : notes manuscrites (s.d.), copies de tapuscrit annoté (s.d.).
Inventory dating : [à partir de 1958]
Édition de démonstration
\[H^{n}(X, \underline{O}_{X})_{\mathrm{ss}} \simeq (H^{n}(X) \otimes_{W} k)_{\mathrm{ss}}\]
LaTeX source
\[
H^{n}(X, \underline{O}_{X})_{\mathrm{ss}} \simeq (H^{n}(X) \otimes_{W} k)_{\mathrm{ss}}
\]\[(*) \qquad 0 \to (\mathrm{Tors}^{n}(X) \otimes k)_{\mathrm{ss}}
\to H^{n}(X, \underline{O}_{X})_{\mathrm{ss}}
\to (H^{n}_{\mathrm{lib}}(X) \otimes k)_{\mathrm{ss}} \to 0\]
LaTeX source
\[
(*) \qquad 0 \to (\mathrm{Tors}^{n}(X) \otimes k)_{\mathrm{ss}}
\to H^{n}(X, \underline{O}_{X})_{\mathrm{ss}}
\to (H^{n}_{\mathrm{lib}}(X) \otimes k)_{\mathrm{ss}} \to 0
\]\[(**) \qquad 0 \to (H^{n}_{\mathrm{lib}}(X) \otimes k)^{\mathrm{ss}}
\to H^{0}(X, \Omega^{n}_{X})^{\mathrm{ss}}
\to {}_{p}\mathrm{Tors}^{n+1}(X)^{\mathrm{ss}} \to 0\]
LaTeX source
\[
(**) \qquad 0 \to (H^{n}_{\mathrm{lib}}(X) \otimes k)^{\mathrm{ss}}
\to H^{0}(X, \Omega^{n}_{X})^{\mathrm{ss}}
\to {}_{p}\mathrm{Tors}^{n+1}(X)^{\mathrm{ss}} \to 0
\]\[(8.1.1) \qquad H_{\mathrm{DR}}(X) = H(X) \otimes^{L}_{W} k\]
LaTeX source
\[
(8.1.1) \qquad H_{\mathrm{DR}}(X) = H(X) \otimes^{L}_{W} k
\]\[(8.1.2) \qquad 0 \to H^{i}(X) \otimes_{W} k \to H^{i}_{\mathrm{DR}}(X)
\to \mathrm{Tor}^{W}_{1}(H^{i+1}(X), k) \to 0 .\]
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\[
(8.1.2) \qquad 0 \to H^{i}(X) \otimes_{W} k \to H^{i}_{\mathrm{DR}}(X)
\to \mathrm{Tor}^{W}_{1}(H^{i+1}(X), k) \to 0 .
\]\[(8.1.3) \qquad \bigl(0 \to \mathrm{Ker}\, u_{0} \to \mathrm{Ker}\, u_{1} \to
\mathrm{Ker}\, u_{2} \to\bigr)\; E(Y) \otimes_{W} k \to
\underbrace{E_{\mathrm{DR}}(Y)}_{=\,\mathrm{Coker}\, u_{1}}
\to \mathrm{Coker}\, u_{2} \to 0 ,\]
LaTeX source
\[
(8.1.3) \qquad \bigl(0 \to \mathrm{Ker}\, u_{0} \to \mathrm{Ker}\, u_{1} \to
\mathrm{Ker}\, u_{2} \to\bigr)\; E(Y) \otimes_{W} k \to
\underbrace{E_{\mathrm{DR}}(Y)}_{=\,\mathrm{Coker}\, u_{1}}
\to \mathrm{Coker}\, u_{2} \to 0 ,
\]\[E(Y) = \mathrm{Coker}\bigl(H^{n-1}(X) \xrightarrow{u_{0}} H^{n-1}(Y)\bigr),
\qquad
E_{\mathrm{DR}}(Y) = \mathrm{Coker}\bigl(H^{n-1}_{\mathrm{DR}}(X)
\xrightarrow{u_{1}} H^{n-1}_{\mathrm{DR}}(Y)\bigr),\]
LaTeX source
\[
E(Y) = \mathrm{Coker}\bigl(H^{n-1}(X) \xrightarrow{u_{0}} H^{n-1}(Y)\bigr),
\qquad
E_{\mathrm{DR}}(Y) = \mathrm{Coker}\bigl(H^{n-1}_{\mathrm{DR}}(X)
\xrightarrow{u_{1}} H^{n-1}_{\mathrm{DR}}(Y)\bigr),
\]\[(8.1.4) \qquad u_{2} : \mathrm{Tor}^{W}_{1}(H^{n}(X), k) \to
\mathrm{Tor}^{W}_{1}(H^{n}(Y), k).\]
LaTeX source
\[
(8.1.4) \qquad u_{2} : \mathrm{Tor}^{W}_{1}(H^{n}(X), k) \to
\mathrm{Tor}^{W}_{1}(H^{n}(Y), k).
\]\[(8.2.1) \qquad u'_{2} : \mathrm{Tors}^{n-1}(Y) \otimes_{W} k \to
\mathrm{Tors}^{n+1}(X) \otimes_{W} k\]
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\[
(8.2.1) \qquad u'_{2} : \mathrm{Tors}^{n-1}(Y) \otimes_{W} k \to
\mathrm{Tors}^{n+1}(X) \otimes_{W} k
\]\[(8.3.1) \qquad \mathrm{Tors}^{n-1}(X) \simeq \mathrm{Tors}^{n-1}(Y).\]
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\[
(8.3.1) \qquad \mathrm{Tors}^{n-1}(X) \simeq \mathrm{Tors}^{n-1}(Y).
\]\[(8.3.2) \qquad u''_{2} : \mathrm{Tors}^{n-1}(X) \otimes_{W} k \to
\mathrm{Tors}^{n+1}(X) \otimes_{W} k\]
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\[
(8.3.2) \qquad u''_{2} : \mathrm{Tors}^{n-1}(X) \otimes_{W} k \to
\mathrm{Tors}^{n+1}(X) \otimes_{W} k
\]\[(8.3.3) \qquad \mathrm{Ker}\, u_{0} = 0 .\]
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\[
(8.3.3) \qquad \mathrm{Ker}\, u_{0} = 0 .
\]\[(8.4.1) \qquad 0 \to (\mathrm{Ker}\, u_{1})_{\mathrm{ss}} \to
(\mathrm{Ker}\, u_{2})_{\mathrm{ss}} \to (E(Y) \otimes_{W} k)_{\mathrm{ss}}
\to E_{\mathrm{DR}}(Y)_{\mathrm{ss}} \to (\mathrm{Coker}\, u_{2})_{\mathrm{ss}}
\to 0 .\]
LaTeX source
\[
(8.4.1) \qquad 0 \to (\mathrm{Ker}\, u_{1})_{\mathrm{ss}} \to
(\mathrm{Ker}\, u_{2})_{\mathrm{ss}} \to (E(Y) \otimes_{W} k)_{\mathrm{ss}}
\to E_{\mathrm{DR}}(Y)_{\mathrm{ss}} \to (\mathrm{Coker}\, u_{2})_{\mathrm{ss}}
\to 0 .
\]\[H^{i}_{\mathrm{DR}}(X) \to H^{i}(X, \underline{O}_{X})\]
LaTeX source
\[
H^{i}_{\mathrm{DR}}(X) \to H^{i}(X, \underline{O}_{X})
\]\[E_{1}^{a,b} = H^{b}(X, \underline{\Omega}^{a}_{X/k}) \Longrightarrow
H^{\bullet}_{\mathrm{DR}}(X),\]
LaTeX source
\[
E_{1}^{a,b} = H^{b}(X, \underline{\Omega}^{a}_{X/k}) \Longrightarrow
H^{\bullet}_{\mathrm{DR}}(X),
\]\[(8.5.1) \qquad 0 \to \mathrm{Ker}\, v \xrightarrow{w}
({}_{p}\mathrm{Tors}^{n}(X))_{\mathrm{ss}} \to
(E(Y) \otimes_{W} k)_{\mathrm{ss}} \xrightarrow{\varphi}
\underbrace{E(Y, \underline{O}_{Y})_{\mathrm{ss}}}_{\simeq\, \mathrm{Coker}\, v}
\to 0 ,\]
LaTeX source
\[
(8.5.1) \qquad 0 \to \mathrm{Ker}\, v \xrightarrow{w}
({}_{p}\mathrm{Tors}^{n}(X))_{\mathrm{ss}} \to
(E(Y) \otimes_{W} k)_{\mathrm{ss}} \xrightarrow{\varphi}
\underbrace{E(Y, \underline{O}_{Y})_{\mathrm{ss}}}_{\simeq\, \mathrm{Coker}\, v}
\to 0 ,
\]\[(8.5.2) \qquad v : H^{n-1}(X, \underline{O}_{X})_{\mathrm{ss}} \to
H^{n-1}(Y, \underline{O}_{Y})_{\mathrm{ss}} ,\]
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\[
(8.5.2) \qquad v : H^{n-1}(X, \underline{O}_{X})_{\mathrm{ss}} \to
H^{n-1}(Y, \underline{O}_{Y})_{\mathrm{ss}} ,
\]\[(8.5.3) \qquad w : (\mathrm{Tors}^{n-1}(X) \otimes_{W} k)_{\mathrm{ss}}
\xrightarrow{u_{d\xi}} (\mathrm{Tors}^{n+1}(X) \otimes_{W} k)_{\mathrm{ss}}\]
LaTeX source
\[
(8.5.3) \qquad w : (\mathrm{Tors}^{n-1}(X) \otimes_{W} k)_{\mathrm{ss}}
\xrightarrow{u_{d\xi}} (\mathrm{Tors}^{n+1}(X) \otimes_{W} k)_{\mathrm{ss}}
\]\[(8.5.4) \qquad E(Y) \overset{\mathrm{dfn}}{=}
\mathrm{Coker}\bigl(H^{n-1}(X) \to H^{n-1}(Y)\bigr)\]
LaTeX source
\[
(8.5.4) \qquad E(Y) \overset{\mathrm{dfn}}{=}
\mathrm{Coker}\bigl(H^{n-1}(X) \to H^{n-1}(Y)\bigr)
\]\[(8.5.5) \qquad \dim (E(Y) \otimes_{W} k)_{\mathrm{ss}} =
\dim E(Y, \underline{O}_{Y})_{\mathrm{ss}} +
\bigl(\dim ({}_{p}\mathrm{Tors}^{n}(X))_{\mathrm{ss}}
- \dim \mathrm{Ker}\, v\bigr) ,\]
LaTeX source
\[
(8.5.5) \qquad \dim (E(Y) \otimes_{W} k)_{\mathrm{ss}} =
\dim E(Y, \underline{O}_{Y})_{\mathrm{ss}} +
\bigl(\dim ({}_{p}\mathrm{Tors}^{n}(X))_{\mathrm{ss}}
- \dim \mathrm{Ker}\, v\bigr) ,
\]\[(8.5.6) \qquad \dim (E(Y) \otimes_{W} k)_{\mathrm{ss}} \geq
\dim E(Y, \underline{O}_{Y})_{\mathrm{ss}}\]
LaTeX source
\[
(8.5.6) \qquad \dim (E(Y) \otimes_{W} k)_{\mathrm{ss}} \geq
\dim E(Y, \underline{O}_{Y})_{\mathrm{ss}}
\]\[H^{n-1}(X, \underline{O}_{X}(-d)) = 0 .\]
LaTeX source
\[
H^{n-1}(X, \underline{O}_{X}(-d)) = 0 .
\]\[\dim E(Y, \underline{O}_{Y})_{\mathrm{ss}} > 0 \qquad \text{pour} \quad
d \to +\infty ,\]
LaTeX source
\[
\dim E(Y, \underline{O}_{Y})_{\mathrm{ss}} > 0 \qquad \text{pour} \quad
d \to +\infty ,
\]\[\begin{aligned}
(8.5.11.1) \qquad \dim_{k} H^{n-1}(X, \underline{O})_{\mathrm{ss}} &=
\dim_{\mathbf{F}_{p}} H^{n-1}(\overline{X}, \mathbf{Z}/p\mathbf{Z}) \\
&\geq
\dim\bigl((H^{n-1}(X)/\mathrm{Tors}^{n-1}(X)) \otimes k\bigr)_{\mathrm{ss}}
\end{aligned}\]
LaTeX source
\[
\begin{aligned}
(8.5.11.1) \qquad \dim_{k} H^{n-1}(X, \underline{O})_{\mathrm{ss}} &=
\dim_{\mathbf{F}_{p}} H^{n-1}(\overline{X}, \mathbf{Z}/p\mathbf{Z}) \\
&\geq
\dim\bigl((H^{n-1}(X)/\mathrm{Tors}^{n-1}(X)) \otimes k\bigr)_{\mathrm{ss}}
\end{aligned}
\]\[({}_{p}\mathrm{Tors}^{2}(X))_{\mathrm{ss}} \simeq
H^{1}(X, \mathbf{Z}/p\mathbf{Z}) \otimes k = \mathrm{Ker}\, \varphi\]
LaTeX source
\[
({}_{p}\mathrm{Tors}^{2}(X))_{\mathrm{ss}} \simeq
H^{1}(X, \mathbf{Z}/p\mathbf{Z}) \otimes k = \mathrm{Ker}\, \varphi
\]