What are $\delta_0$ and $\delta_1$ in the diagram of the definition $2.1$ in the notion of homotopy here?
2026-03-24 23:40:57.1774395657
Left homotopy groups
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They are constant functions. For any $x\in X$, we have $\delta_0(x) = 0$ and $\delta_1(x) = 1$.