hjpotter92
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 Mar 27 awarded Yearling Jan 6 comment Dividing by $x!$ In your second question, you do not have identical flags for all countries. Jan 6 reviewed Edit Dividing by $x!$ Jan 6 revised Dividing by $x!$ improved formatting Nov 17 reviewed Looks OK Subsets in axiomatic set theory - ZFC Nov 9 reviewed Looks OK Gradient of a dot product Nov 9 comment Minimum and maximum values of $(\vec{r}\times\hat{j}).\vec{c}$ HINT: What would be $\hat{k} \cdot \vec{c}$? Nov 9 revised Minimum and maximum values of $(\vec{r}\times\hat{j}).\vec{c}$ deleted 14 characters in body Nov 9 revised Linear equations modulo different prime through CRT deleted 6 characters in body Nov 3 comment Find the maximum of the following function $\frac{dy}{dt}$ Nov 3 reviewed Edit Find the maximum of the following function Nov 3 revised Find the maximum of the following function Math modeling enter Nov 2 revised If a matrix is row equivalent to some invertible matrix then it is invertible added 13 characters in body Nov 2 comment Making a determinant easier to solve to find characteristic polynomial Did you try finding the characteristic equation after column operation as suggested in the question? Nov 2 revised Making a determinant easier to solve to find characteristic polynomial deleted 19 characters in body Oct 31 reviewed Looks OK Why is this not a linear transformation from P2 to P3? Oct 31 reviewed Looks OK if $a(b-c)x^2+b(c-a)x+c(a-b)=0$ has repeated roots prove… Oct 30 revised How many 5-digit falling numbers are there? deleted 1 character in body Oct 30 answered Sum of real numbers and modular arithmetic Oct 30 revised Solve this using modular arithmetic deleted 24 characters in body