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 10h asked Is there any partial sums of harmonic series that is integer? Feb 4 answered How do I evaluate this sum :$\sum_{n=1}^{\infty}\frac{{(-1)}^{n²}}{{(i\pi)}^{n}}$? Jan 19 asked is this correct $\lim_{ n \to \infty} \sum_{k=2^n}^{2^{n+1}} \frac{1}{k}= \ln 2$? Jan 14 asked Example of two analytic functions that differ at countably infinity many point Jan 13 answered Let $f(x) = (x^n-1)/(x-1)$. Why does $f(1)=n$? Jan 7 asked example of a function that could only be defined recursively Dec 14 asked Alternative definition for Exponential and Logarithmic functions to prove identities (and by extension sin and cos related identities) Dec 7 answered Divide a number to unequal parts Nov 29 answered Proof that the number $\sqrt[3]{2}$ is irrational using Fermat's Last Theorem Nov 29 asked Is FTC equivalent to Differentiating integrals and Integrating Differentials? Nov 29 asked Ellipse by moving center of a parametric circle equation? Nov 18 asked Simple examples of applications of converse, contrapositive and inverse used in mathematical proofs rather than logic. Nov 12 asked Convergence rate for $a_{n+1}=\sqrt{2 \sqrt {a_n}}$? Nov 9 asked Is there any kind of known pattern to $\sqrt 2$ in base 2? Nov 8 asked Numbers similar to Ramanujan's taxi cab number Nov 8 asked Equation of 3 circles touching each other is given, what is the equation of a circle touching all 3? Oct 28 asked what has $\mathbb R$ as a proper subset of it's solution sets that has nothing to do with $\mathbb C$? Oct 16 asked How to justify that due to unique factorisation $d(d + 2b) = b\times b$ where \$0