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 Yearling
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Jan
15
comment Is is possible to obtain exactly 16 black cells?
@JesseWilliams, note that the sequence of operations you describe does the same as just choosing columns 1 and 3 (and not row 1 at all). That's what the answer means when it says "First notice that the order in which we perform the row/column operations doesn't matter and that using two times the same column/row does nothing.".
Jan
4
comment Difficult Integral
This answer would be much improved if it would include an explanation for the first equation: how you know that the LHS = something of the form of the RHS.
Dec
21
awarded  Yearling
Dec
15
revised Where to make a conjunction instead of an implication?
clearer, methinks
Dec
15
revised Markov Process: predict the weather using a stochastic matrix
edit in a necessary fact (which I gleaned from the sequel)
Dec
15
suggested approved edit on Markov Process: predict the weather using a stochastic matrix
Dec
15
suggested approved edit on Where to make a conjunction instead of an implication?
Dec
13
revised Fundamentals of applications of limits in integration
easier to read
Dec
13
suggested approved edit on Fundamentals of applications of limits in integration
Dec
9
comment If we randomly select 25 integers between 1 and 100, how many consecutive integers should we expect?
Because the asker is interested in the expected number when most students have left, it makes sense to generalize this from $25$ to other numbers $k<100$ and even to values of $n$ different from $100$. The answer is always $k(k-1)/n$ pairs of students. It may be worth noting this in the answer.
Nov
29
comment Exercise 18.3 from James Munkres' Topology, how should I interpret this question?
@AlecTeal, yes.
Nov
24
awarded  Civic Duty
Nov
10
revised Trouble with newton's method.
text not image, for SEO and the blind
Nov
10
suggested approved edit on Trouble with newton's method.
Jul
5
awarded  Benefactor
Jun
29
awarded  Nice Question
Jun
28
awarded  Promoter
Jun
28
revised How big is my pizza, if I know its slices' sizes?
added 98 characters in body
Jun
28
revised How big is my pizza, if I know its slices' sizes?
clarify (angle is at C, not O)
Jun
26
comment How big is my pizza, if I know its slices' sizes?
@tpb261, interesting. I was more interested in the slices' sidelengths, to be honest, but, if you can make your method work, go for it.