Cote n° 134-1 · pages 3–4 · 4 displayed formulas · Lettres Breen 75,76 [correspondance avec Larry Breen, Pierre Deligne et Daniel Quillen] : lettres et copies de lettre (1974-1976, 1984).
Inventory dating : 1974-1984
Édition de démonstration

batch 1 · p. 3 — read it beside the facsimile1 / 4 · 11 distinct symbols, 19 written
\[\tau_{\leq 2} \, R\underline{\mathrm{Hom}}(M, N) = E(M, N)\]
LaTeX source
\[ \tau_{\leq 2} \, R\underline{\mathrm{Hom}}(M, N) = E(M, N) \]
batch 1 · p. 3 — read it beside the facsimile2 / 4 · 18 distinct symbols, 50 written
\[\begin{cases} \underline{H}^i = \underline{\mathrm{Ext}}^i(M, N) & \text{pour } 0 \leq i \leq 2 \\ \underline{H}^i = 0 & \text{si } i \notin [0, 2] \end{cases}\]
LaTeX source
\[ \begin{cases}
\underline{H}^i = \underline{\mathrm{Ext}}^i(M, N) & \text{pour } 0 \leq i \leq 2 \\
\underline{H}^i = 0 & \text{si } i \notin [0, 2]
\end{cases} \]
batch 1 · p. 3 — read it beside the facsimile3 / 4 · 3 distinct symbols, 3 written
\[(T)\]
LaTeX source
\[ (T) \]
batch 1 · p. 4 — read it beside the facsimile4 / 4 · 16 distinct symbols, 47 written
\[(*) \qquad 0 \longrightarrow \underline{\mathrm{Ext}}^2(M, N) \longrightarrow \underbrace{\underline{H}^2(E'(M,N))}_{P(M,N)} \xrightarrow{\ \sigma\ } \underline{\mathrm{Hom}}(M, {}_2 N) \longrightarrow 0\]
LaTeX source
\[ (*) \qquad 0 \longrightarrow \underline{\mathrm{Ext}}^2(M, N)
   \longrightarrow \underbrace{\underline{H}^2(E'(M,N))}_{P(M,N)}
   \xrightarrow{\ \sigma\ } \underline{\mathrm{Hom}}(M, {}_2 N)
   \longrightarrow 0 \]