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Dec
2
comment Proof that every circle has the ratio of $\pi$
This is not true on a sphere.
Dec
2
revised evaluating $\int_{_C}cothz \,dz $ using residue theorem
edited title
Dec
1
comment Proof by Induction for a $f_3 + f_6 + · · · + f_{3n} = \frac{1}{2} (f_{3n+2} - 1)$
+1 for showing your attempt.
Dec
1
comment Is every proof for natural numbers equivalent to an induction proof?
@Esokrates : Very true, what the hell was I thinking. That is usually my line as well.
Dec
1
revised Is every proof for natural numbers equivalent to an induction proof?
added 117 characters in body
Dec
1
answered Is every proof for natural numbers equivalent to an induction proof?
Dec
1
comment Is there a practical real use of integration?
math.stackexchange.com/questions/570138/…
Dec
1
comment What's the deal with integration?
math.stackexchange.com/questions/188933/…
Nov
30
revised Simplify $(6\sqrt{x} + 3\sqrt{y})\cdot(6\sqrt{x} - 3\sqrt{y})$.
edited title
Nov
30
revised Simplify $(6\sqrt{x} + 3\sqrt{y})\cdot(6\sqrt{x} - 3\sqrt{y})$.
rolled back to a previous revision
Nov
30
reviewed Approve Simplify $(6\sqrt{x} + 3\sqrt{y})\cdot(6\sqrt{x} - 3\sqrt{y})$.
Nov
30
revised Generalizing $\int_{0}^{1} \frac{\arctan\sqrt{x^{2} + 2}}{\sqrt{x^{2} + 2}} \, \frac{\operatorname dx}{x^{2}+1} = \frac{5\pi^{2}}{96}$
edited title
Nov
30
revised Integral $\int_{0}^{i}z\sin{z} \operatorname dz$
edited title
Nov
30
revised Sum $\sum_{n=2}^\infty\frac{a^{n+1}}{n(n-1)}z^{n}$
edited title
Nov
30
revised Why $\int_0^\infty e^{-t}\log tdt =-\gamma$?
edited title
Nov
30
revised Evaluating $\int\frac{\cos(\frac{1}{x})}{x^2}\operatorname dx$?
added 24 characters in body; edited title
Nov
30
revised Minimizing area of a triangle
added 133 characters in body
Nov
30
revised How to integrate $\int\frac{\sqrt{1-x}}{\sqrt{x}}\ \mathrm dx$
edited title
Nov
30
revised What does power of '+' in $\hat{\beta}_j=\operatorname {sign} (\hat{\beta^0_j})(|\hat{\beta^0_j}|-\gamma)^+$means?
removed the picture with latex instead
Nov
29
comment Is $\tan(\pi/2)$ undefined or infinity?
@Adam : please refer to accepted answer for:math.stackexchange.com/questions/312438/infinity-undefined?rq=1