142 Transpose of inverse vs inverse of transpose 118 Solve $4^{9x-4} = 3^{9x-4}$ 116 Is an irrational number odd or even? 104 If there are obvious things, why should we prove them? 62 What is the difference between minimum and infimum?

Reputation (36,093)

 +30 What is the difference between minimum and infimum? +10 Transpose of inverse vs inverse of transpose +10 If $AB=I_n$ and $BA=I_m$ then $n=m$. +10 Find the distance between the line and plane

Questions (16)

 42 Where to begin with foundations of mathematics 12 Explaining why we can't “find” an antiderivative of $f(t) = e^{t^2}$. 10 Proving results in representation theory from category theory 10 Can a function be increasing *at a point*? 8 Rigour vs intuition

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 455 calculus × 158 227 abstract-algebra × 77 294 algebra-precalculus × 68 183 education × 20 255 real-analysis × 60 180 proof-writing × 15 251 soft-question × 34 177 linear-algebra × 71 244 matrices × 28 163 irrational-numbers × 5

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