John Hughes

 65 How did mathematicians decide on the axioms of linear algebra 44 Trouble understanding only one way implication truth 39 Can you completely permute the elements of a matrix by applying permutation matrices? 38 How do you calculate a sum over a polynomial? 35 If I have a $0.00048\%$ chance of dying every second, how to numerically calculate the chance I have of dying in a day?

### Reputation (66,194)

 +35 A Simple Proof of the FTA using only elementary theory? +25 Getting permutations of independent sequences with uniform probability +10 Homomorphisms between fields are injective. +10 Find all matrices that commute with given matrix

### Questions (7)

 11 Why do choirs work? 11 Limits and substitution 7 Possibly rotated parabola from three points 6 Proving a solution to a double recurrence is exhaustive 6 Integer $2 \times 2$ matrices such that $A^n = I$

### Tags (568)

 758 linear-algebra × 426 281 real-analysis × 178 418 calculus × 235 273 general-topology × 116 406 geometry × 238 195 algebraic-topology × 103 398 matrices × 203 183 abstract-algebra × 73 296 differential-geometry × 174 170 derivatives × 63

### Accounts (14)

 Mathematics 66,194 rep 24394 Stack Overflow 279 rep 215 TeX - LaTeX 251 rep 128 Electrical Engineering 142 rep 4 Robotics 134 rep 13