Mathematics - Posts by celtschk‭

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Meta Why doesn't \$ work?

posted 3y ago by celtschk‭ · edited 3y ago by DNB‭

Answer

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Q&A Are there useful topologies on Cartesian products “in between” the product topology and the box topology?

0 answers · posted 4y ago by celtschk‭ · edited 4y ago by celtschk‭

Question topology

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Q&A Classification of topological points

1 answer · posted 4y ago by celtschk‭ · last activity 4y ago by Technically Natural‭

Question topology

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Q&A Does this construction always give a topological vector space?

1 answer · posted 3y ago by celtschk‭ · last activity 6mo ago by JohnnyJohn‭

Question topology linear-algebra topological-vector-spaces

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Q&A Are 3 10% chances better than one 30% chance (when penalized by a variable for failures)?

posted 4y ago by celtschk‭

Answer

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Q&A Does this generalization of path-connectedness also cover general connectedness?

1 answer · posted 4y ago by celtschk‭ · last activity 4mo ago by ronno‭

Question topology connectedness

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Q&A Does there exist a non-zero game such that the sum of three or more copies of it is zero?

0 answers · posted 2y ago by celtschk‭

Question combinatorial-game-theory

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Q&A Why aren't $z_1=f(xy)$ and $z_2=f(x/y)$ functions of 2 variables?

posted 3y ago by celtschk‭

Answer

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Meta $sitename not substituted in FAQ

1 answer · posted 4y ago by celtschk‭ · edited 4y ago by Mithical‭

Question bug status-completed faq

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Q&A Is this topology basis dependent?

1 answer · posted 4y ago by celtschk‭ · last activity 3y ago by Incnis Mrsi‭

Question topology linear-algebra topological-vector-spaces

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Q&A Intuitively, why's X% of Y = Y% of X?

posted 3y ago by celtschk‭

Answer

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Q&A Is this formula for the minimal sum correct?

1 answer · posted 2y ago by celtschk‭ · last activity 2y ago by celtschk‭

Question set-theory ordinal-numbers

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Q&A Prove that $\int \ddot{x}(t)\mathrm dt=v_0 + \frac{F_0}{m}t$

posted 3y ago by celtschk‭

Answer

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Q&A For which spaces are all continuous functions either constant or the identity?

0 answers · posted 5mo ago by celtschk‭ · edited 5mo ago by celtschk‭

Question topology

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Meta LaTeX formulas not rendered correctly in summary

1 answer · posted 2y ago by celtschk‭ · edited 1y ago by Monica Cellio‭

Question bug status-completed MathJax-rendering

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Q&A All numbers are triangular modulo $N$ iff $N$ is a power of $2$?

1 answer · posted 5mo ago by celtschk‭ · last activity 5mo ago by Peter Taylor‭

Question modular-arithmetic

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Q&A Is $x=\int \int \ddot{x}\mathrm dx \mathrm dx$?

posted 3y ago by celtschk‭

Answer

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Q&A Is there a closed formula for multiplication of imaginary units in the direct limit of the Cayley-Dickson construction?

1 answer · posted 4mo ago by celtschk‭ · last activity 3mo ago by r~~‭

Question algebra

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Meta Why isn't MathJax table appearing?

posted 3y ago by celtschk‭

Answer

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Q&A How's it possible to arrange 0 objects? How can 0! = 1?

posted 3y ago by celtschk‭

Answer

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Q&A Why must percent change divide the difference by the old, NOT new, value?

posted 3y ago by celtschk‭

Answer

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Q&A Getting backward of partial differentiation's chain rule

posted 3y ago by celtschk‭

Answer

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Q&A What's wrong with evaluating $n(n-1) \dots (n-[k-3])(n-[k-2])\color{red}{(n-[k-1])}$ at $k = 1$?

posted 3y ago by celtschk‭

Answer

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Q&A Why rational to be indifferent between two urns, when urn A has 50-50 red and white balls, but you don't know urn B's ratio?

posted 3y ago by celtschk‭ · edited 3y ago by celtschk‭

Answer

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Q&A Why does “unless” mean “if not”?

posted 4y ago by celtschk‭

Answer

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Posts by celtschk‭