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 May 3 asked Can there be a numerical system in which logarithms can be expressed in terms of exponents in closed form? Mar 14 asked Classifying countable sets of weighted dots on a real line. Feb 14 answered What is $0^{i}$? Dec 7 answered Zero divided by zero must be equal to zero Nov 9 answered square root of two is 1.41…, can we evaluate infinite(th) root of 2? Nov 7 answered Is term “real number” equivalent to “group of algorithms generating stream of digits”? Nov 7 answered a Function with several periods Nov 3 asked Interpreting infinite integer lattice as a manifold of negative dimension Oct 16 answered Is there a metric in which 1+2+3+4+… converges to -1/12? Sep 9 asked How to sum up this series? $\sum_{n=1}^\infty\frac{(-1)^{n-1} B_n}{n}$ Sep 9 answered Why does $1+2+3+\cdots = -\frac{1}{12}$? Sep 9 asked Series expansions of trigonometric functions using cosecant numbers Aug 29 asked What function is this? $\sum_{k=0}^\infty \frac{2^{2k}z^{2k-1}}{(2k)!}$ Aug 29 asked What is the sum of this series? $\sum_{n=1}^\infty\frac{\zeta(1-n)(-1)^{n+1}}{2^{n-1}}$ Aug 29 asked What is the sum of this series? $\sum_{n=1}^\infty\frac{2^n (-1)^{n+1} B_n}{n}$ Aug 23 asked What happens if to introduce infinite and infinitesimel quantities this way? Aug 23 asked Conventions adopted for extended reals Aug 23 answered Why is there antagonism towards extended real numbers? Aug 23 asked Is there a name for complex numbers over affinely extended reals? Aug 18 answered Is there a formulaic way to go from $\sum_{k=1}^{n} \frac{1}{k}$ back to $n$?