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Nov
23
comment A small confusion in network flows (conservation constraints).
Oh, sorry. I usually confuse edge with vertex.
Nov
23
revised A small confusion in network flows (conservation constraints).
deleted 2 characters in body
Nov
23
comment A small confusion in network flows (conservation constraints).
@Casteels Yes. But I'm only applying it to $v,w$.
Nov
23
asked A small confusion in network flows (conservation constraints).
Nov
23
comment When there is a proposition $(P\rightarrow Q)$, which row in the truth table of $\rightarrow $ should I use?
@GitGud Good! Thanks!
Nov
23
comment When there is a proposition $(P\rightarrow Q)$, which row in the truth table of $\rightarrow $ should I use?
This does not answer what I have asked. I know how to prove it, my question is about the underlining mechanism of proof.
Nov
23
asked When there is a proposition $(P\rightarrow Q)$, which row in the truth table of $\rightarrow $ should I use?
Nov
22
accepted What is $\Gamma(a)$?
Nov
22
asked What is $\Gamma(a)$?
Nov
22
accepted Showing the equality of two rook polynomials.
Nov
22
asked What's the meaning of dual concept?
Nov
18
comment How many different ways are there from $(0,0,0)$ to the point $(4,3,5)$?
@ChrisCulter Yes. But as I say, I changed it a bit (and continued afraid of didn't have made my point clearly), then I added the note. In the test, it's not so clear like I wrote.
Nov
18
asked How many different ways are there from $(0,0,0)$ to the point $(4,3,5)$?
Nov
18
accepted Silly mistake on evaluating the sixth term of $\left (\frac{a}{b}+\frac{b}{a^2}\right)^{17}$?
Nov
16
comment Silly mistake on evaluating the sixth term of $\left (\frac{a}{b}+\frac{b}{a^2}\right)^{17}$?
I had evaluated it through the other side and got a different result. Now I see that it's actually that result.
Nov
16
awarded  Great Question
Nov
16
asked Silly mistake on evaluating the sixth term of $\left (\frac{a}{b}+\frac{b}{a^2}\right)^{17}$?
Nov
16
comment Why isn't Mary a victim of the permutation?
John is used in the latter questions. I forgot to take him out of the playground.
Nov
15
asked Why isn't Mary a victim of the permutation?
Nov
15
comment A small doubt about slopes.
@Calculus No need for that. He probably still doesn't know the rules of the place.