Cote n° 106 · pages 1–15
· 26 displayed formulas · [Champs (stacks) 3] : notes manuscrites (s.d.).
Inventory dating : [à partir de 1982]
Édition de démonstration
\[W_{\mathrm{cof}}^{-1}\mathcal{C}_{\mathrm{cof}} \longrightarrow W^{-1}\mathcal{C}\]
LaTeX source
\[
W_{\mathrm{cof}}^{-1}\mathcal{C}_{\mathrm{cof}} \longrightarrow W^{-1}\mathcal{C}
\]\[\Phi : W^{-1}\mathcal{C} \longrightarrow
W_{\mathrm{cof}}^{-1}\mathcal{C}_{\mathrm{cof}},
\qquad \text{i.e.\ } \mathcal{C} \longrightarrow
W_{\mathrm{cof}}^{-1}\mathcal{C}_{\mathrm{cof}}\]
LaTeX source
\[
\Phi : W^{-1}\mathcal{C} \longrightarrow
W_{\mathrm{cof}}^{-1}\mathcal{C}_{\mathrm{cof}},
\qquad \text{i.e.\ } \mathcal{C} \longrightarrow
W_{\mathrm{cof}}^{-1}\mathcal{C}_{\mathrm{cof}}
\]\[[i]^{-1}\widetilde{f} : \widetilde{x} \longrightarrow \widetilde{y}
\qquad \text{dans } \mathrm{Hom}_{W_{\mathrm{cof}}^{-1}
\mathcal{C}_{\mathrm{cof}}}(\widetilde{x}, \widetilde{y}).\]
LaTeX source
\[
[i]^{-1}\widetilde{f} : \widetilde{x} \longrightarrow \widetilde{y}
\qquad \text{dans } \mathrm{Hom}_{W_{\mathrm{cof}}^{-1}
\mathcal{C}_{\mathrm{cof}}}(\widetilde{x}, \widetilde{y}).
\]\[R \overset{\text{déf}}{=} \Psi\Phi|\mathcal{C},
\qquad x \longmapsto \widetilde{x},
\qquad \mathcal{C} \longrightarrow W^{-1}\mathcal{C}\]
LaTeX source
\[
R \overset{\text{déf}}{=} \Psi\Phi|\mathcal{C},
\qquad x \longmapsto \widetilde{x},
\qquad \mathcal{C} \longrightarrow W^{-1}\mathcal{C}
\]\[R(x) = \widetilde{x} \overset{[\alpha_x]}{\longrightarrow} x\]
LaTeX source
\[
R(x) = \widetilde{x} \overset{[\alpha_x]}{\longrightarrow} x
\]\[[\alpha_y]\,\bigl([i_f]^{-1}[\widetilde{f}]\bigr) = [f]\,[\alpha_x].\]
LaTeX source
\[
[\alpha_y]\,\bigl([i_f]^{-1}[\widetilde{f}]\bigr) = [f]\,[\alpha_x].
\]\[[\beta_f \widetilde{f}] = [f\alpha_x] = [f][\alpha_x]
\qquad \text{cqfd.}\]
LaTeX source
\[
[\beta_f \widetilde{f}] = [f\alpha_x] = [f][\alpha_x]
\qquad \text{cqfd.}
\]\[\underline{Ch}_0(x,y) = \text{catégorie des diagrammes}\]
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\[
\underline{Ch}_0(x,y) = \text{catégorie des diagrammes}
\]\[\underline{Ch}_0(x,y) \times \underline{Ch}_0(y,z) \longrightarrow
\underline{Ch}_0(x,z),
\qquad (F, G) \longmapsto G \cdot F\]
LaTeX source
\[
\underline{Ch}_0(x,y) \times \underline{Ch}_0(y,z) \longrightarrow
\underline{Ch}_0(x,z),
\qquad (F, G) \longmapsto G \cdot F
\]\[(g,j) \circ (f,i) = (g'g) \cdot \uncertain{k_y}\]
LaTeX source
\[
(g,j) \circ (f,i) = (g'g) \cdot \uncertain{k_y}
\]\[\underline{\mathrm{Hom}}_{\mathcal{C}}(x,y)_{\text{discret}}
\longrightarrow \underline{Ch}_0(x,y),
\qquad f \longmapsto (f, 1d_x)\]
LaTeX source
\[
\underline{\mathrm{Hom}}_{\mathcal{C}}(x,y)_{\text{discret}}
\longrightarrow \underline{Ch}_0(x,y),
\qquad f \longmapsto (f, 1d_x)
\]\[\pi_0(x,y) \overset{\text{déf}}{=} \pi_0\bigl(\underline{Ch}_0(x,y)\bigr),\]
LaTeX source
\[
\pi_0(x,y) \overset{\text{déf}}{=} \pi_0\bigl(\underline{Ch}_0(x,y)\bigr),
\]\[\mathcal{C} \longrightarrow \widetilde{\mathcal{C}}.\]
LaTeX source
\[
\mathcal{C} \longrightarrow \widetilde{\mathcal{C}}.
\]\[(gf, i) \in \text{comp.\ conn.\ de } \underline{1}_x
\text{ dans } \pi_0\bigl(\underline{Ch}_0(x,x)\bigr)\]
LaTeX source
\[
(gf, i) \in \text{comp.\ conn.\ de } \underline{1}_x
\text{ dans } \pi_0\bigl(\underline{Ch}_0(x,x)\bigr)
\]\[\alpha g = 1_y.\]
LaTeX source
\[ \alpha g = 1_y. \]
\[q : \widetilde{\mathcal{C}} \longrightarrow W^{-1}\mathcal{C},
\qquad x \longmapsto x,
\qquad (f,i) \longmapsto [i]^{-1}[f]\]
LaTeX source
\[
q : \widetilde{\mathcal{C}} \longrightarrow W^{-1}\mathcal{C},
\qquad x \longmapsto x,
\qquad (f,i) \longmapsto [i]^{-1}[f]
\]\[[f]\,[i]^{-1}[g] = [1_y],\]
LaTeX source
\[
[f]\,[i]^{-1}[g] = [1_y],
\]\[\widetilde{\mathcal{C}} \longrightarrow W^{-1}\mathcal{C}\]
LaTeX source
\[
\widetilde{\mathcal{C}} \longrightarrow W^{-1}\mathcal{C}
\]\[W_0 = W \cap \mathrm{cof}.\]
LaTeX source
\[
W_0 = W \cap \mathrm{cof}.
\]\[F = [f], \qquad G = [1_y, f]\]
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\[ F = [f], \qquad G = [1_y, f] \]
\[\mathcal{C} \longrightarrow \widetilde{\mathcal{C}}\]
LaTeX source
\[
\mathcal{C} \longrightarrow \widetilde{\mathcal{C}}
\]\[\alpha f' = f\]
LaTeX source
\[ \alpha f' = f \]
\[f''_0 = \varphi_0\, g.\]
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\[ f''_0 = \varphi_0\, g. \]
\[u : (f_0, \alpha) \longrightarrow (f''_0, \alpha'')\]
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\[ u : (f_0, \alpha) \longrightarrow (f''_0, \alpha'') \]
\[[f_0, i] = [\mathrm{id}_{\bar{y}}, i] \circ (f, \mathrm{id}_{\bar{y}}),\]
LaTeX source
\[
[f_0, i] = [\mathrm{id}_{\bar{y}}, i] \circ (f, \mathrm{id}_{\bar{y}}),
\]\[\mathcal{C} \longrightarrow \widetilde{\mathcal{C}}.\]
LaTeX source
\[
\mathcal{C} \longrightarrow \widetilde{\mathcal{C}}.
\]