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Apr
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comment Relative homology $H_n(S^2,S^0)$, or other examples
Perfect. Really appreciate all the answers.
Apr
17
accepted Relative homology $H_n(S^2,S^0)$, or other examples
Apr
17
comment Relative homology $H_n(S^2,S^0)$, or other examples
Thanks for the answer! I was under the impression that $H_i(S^2,S^0) \cong H_i(S^2/S^0)$ iff there was a deformation retract. Why can we use this here? Also, why is $S^2/S^0$ homotopy equivalent to $S^2 \vee S^1$?
Apr
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asked Relative homology $H_n(S^2,S^0)$, or other examples
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accepted Area of Spherical Polygon
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asked Area of Spherical Polygon
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Mar
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accepted When does $f:X \to X$ give $L_f(A) \subseteq R_f(A)$ for all $A \subseteq X$?
Mar
11
comment When does $f:X \to X$ give $L_f(A) \subseteq R_f(A)$ for all $A \subseteq X$?
@PaulPlummer: Thank you for working on my problem, it is important to me for an application to a logic paper I am writing. Would you be able to explain your findings in an answer?
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asked When does $f:X \to X$ give $L_f(A) \subseteq R_f(A)$ for all $A \subseteq X$?
Feb
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asked Solving a system of equations with an inequality constraint
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