{\displaystyle Z\subset A^{\circ }} en.wikipedia.org Visit source

{\displaystyle Z} en.wikipedia.org Visit source

{\displaystyle Z\subset A\subset X} en.wikipedia.org Visit source

{\displaystyle X} en.wikipedia.org Visit source

{\displaystyle C_{n}(A)\oplus C_{n}(B)\hookrightarrow C_{n}(X)} en.wikipedia.org Visit source

{\displaystyle B} en.wikipedia.org Visit source

{\displaystyle A} en.wikipedia.org Visit source

{\displaystyle B} en.wikipedia.org Visit source

{\displaystyle A} en.wikipedia.org Visit source

{\displaystyle \sigma } en.wikipedia.org Visit source

{\displaystyle \sigma :\Delta \rightarrow X} en.wikipedia.org Visit source

{\displaystyle \oplus } en.wikipedia.org Visit source

{\displaystyle i:A\cap B\hookrightarrow A,\;j:A\cap B\hookrightarrow B,\;k:A\hookrightarrow X,\;l:B\hookrighta… en.wikipedia.org Visit source

{\displaystyle \qquad \qquad \qquad \qquad \qquad \qquad \qquad \qquad \qquad \qquad \qquad \qquad \cdots \to… en.wikipedia.org Visit source

{\displaystyle \cdots \to H_{n+1}(X)\,\xrightarrow {\partial _{*}} \,H_{n}(A\cap B)\,\xrightarrow {(i_{*},j_{*… en.wikipedia.org Visit source

{\displaystyle X} en.wikipedia.org Visit source

{\displaystyle X=A\cup B} en.wikipedia.org Visit source

{\displaystyle f} en.wikipedia.org Visit source

{\displaystyle L_{K}(f)=tr_{0}(f)=1\neq 0} en.wikipedia.org Visit source

{\displaystyle f_{0}} en.wikipedia.org Visit source

{\displaystyle H_{k}(\mathbb {D} ^{n})} en.wikipedia.org Visit source

{\displaystyle k\geq 1} en.wikipedia.org Visit source

{\displaystyle f:\mathbb {D} ^{n}\rightarrow \mathbb {D} ^{n}} en.wikipedia.org Visit source

{\displaystyle f} en.wikipedia.org Visit source

{\displaystyle L_{K}(f)\neq 0} en.wikipedia.org Visit source

{\displaystyle K} en.wikipedia.org Visit source

{\displaystyle f=id} en.wikipedia.org Visit source

{\displaystyle f} en.wikipedia.org Visit source

{\displaystyle L_{K}(f)=\sum _{i}(-1)^{i}tr_{i}(f)\in K} en.wikipedia.org Visit source

{\displaystyle tr_{i}} en.wikipedia.org Visit source