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Don't have much time these days...


Jul
26
revised finding mod of an expression with variables
edited tags
Jul
25
revised Proving something about the Game Nim
edited tags
Jul
25
comment Asymptotic Behaviour Of A Bizarre Function 2
Related: math.stackexchange.com/questions/115824/…
Jul
25
comment Asymptotic Behaviour Of A Bizarre Function 2
@900sit-upsaday: Thanks! Wasn't aware of this nice feature. Been away from stackexchange long enough...
Jul
24
comment How prove this $\sum_{cyc}\frac{x+y-2z}{(x+y)^2+z^2}=0$
Why is this tagged inequality?
Jul
24
comment Polynomial representation
@Minu: Yes, that is correct.
Jul
24
comment Polynomial representation
@Mathmo123: Don't know. Let's see Minu's response. (You might be right though)
Jul
24
answered Polynomial representation
Jul
24
revised Showing that if $p$ is prime, then $(p^4 + 4)$ can't be prime
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Jul
24
comment Prove that an expression is zero for all sets of distinct $a_1, \dotsc, a_n\in\mathbb{C}$
@DamianPavlyshyn: Yes, or more simply, replace $a_1$ by $z$, do some algebra to get a polynomial in $z$ which has infinite roots (any $z \ne a_i$), allowing setting $z=0$.
Jul
23
revised Prove that an expression is zero for all sets of distinct $a_1, \dotsc, a_n\in\mathbb{C}$
added 54 characters in body
Jul
23
answered Prove that an expression is zero for all sets of distinct $a_1, \dotsc, a_n\in\mathbb{C}$
Jul
23
comment Prove that an expression is zero for all sets of distinct $a_1, \dotsc, a_n\in\mathbb{C}$
Look at the Lagrange polynomial of $P(a_i) = a_i$
Jul
22
revised Discrete Mathematics Function Proof
edited tags
Jul
19
comment Proving that one of $a(1-b), b(1-c), c(1-a) \le \frac{1}{4}$
For $a,b,c \le 1$, see my comment to DanZimm. There is no need of $c$ if $a \le b$. There is an implicity renaming of variables going on. For instance if you chose $a=0.3, b = 0.1, c = 0.4$, we kind of have implicitly swapped $b$ and $c$ in our proof...
Jul
19
comment Proving that one of $a(1-b), b(1-c), c(1-a) \le \frac{1}{4}$
@DanZimm: If $c \ge 1$, then $b(1-c) \le 0$.
Jul
19
revised How could I improve this approximation?
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Jul
19
revised Proving that one of $a(1-b), b(1-c), c(1-a) \le \frac{1}{4}$
edited title
Jul
19
revised Proving that one of $a(1-b), b(1-c), c(1-a) \le \frac{1}{4}$
deleted 385 characters in body
Jul
19
answered Functions with different codomain the same according to my book?