Derek Elkins‭

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A quiet enigma. We don't know anything about Derek Elkins‭ yet.

Posts

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Q&A Complex numbers in 2D, quaternions in 4D, why nothing in 3D?

posted 5mo ago by Derek Elkins‭ · edited 3mo ago by Derek Elkins‭

Answer

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Q&A Does every divergence-free vector field arise as the curl of some vector field?

posted over 1 year ago by Derek Elkins‭ · edited over 1 year ago by Derek Elkins‭

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Q&A Existence of a set of all sets

posted almost 2 years ago by Derek Elkins‭ · edited almost 2 years ago by Derek Elkins‭

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Q&A Why always rationalize a denominator?

posted over 1 year ago by Derek Elkins‭

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Meta Can this site contains Physics's Math question?

posted over 1 year ago by Derek Elkins‭

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Q&A What're the orders for equation expressing?

posted 12mo ago by Derek Elkins‭

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Q&A Can we constructively find a third element of a set $X$ satisfying $X \cong X \times X$ given two distinct elements?

0 answers · posted almost 2 years ago by Derek Elkins‭

Question constructive-logic type-theory

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Q&A Why does this definition of generalized forces work?

posted over 1 year ago by Derek Elkins‭

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Q&A How to show if a set is simply connected?

posted 1y ago by Derek Elkins‭

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Q&A What was Justice Scalia's mathematical mistake in Penry v. Lynaugh (1989)?

posted 1y ago by Derek Elkins‭

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Meta Are challenge-like questions like these considered on-scope in Mathematics CD?

posted 1y ago by Derek Elkins‭

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Q&A Computational hardness of the uniform halting problem

posted almost 2 years ago by Derek Elkins‭

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Q&A Are we in a "history-valley" for Topology?

posted 8mo ago by Derek Elkins‭

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Q&A Maximize Independent Variable of Matrix Multiplication

posted 6mo ago by Derek Elkins‭

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Q&A Show that $f(x) = \arctan\left(\frac{x}{x+1}\right) + \arctan\left(\frac{x+1}{x}\right) = \frac{\pi}{2}$

posted 16d ago by Derek Elkins‭ · edited 16d ago by Derek Elkins‭

Answer

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Reputation		824
Number of top-level posts		2
Number of answers		22
Sum of received votes (up minus down)		86
Number of edits made		10

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Answers		22
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Derek Elkins‭

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