Gottfried Helms
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 Apr 28 revised Convergence properties of $z^{z^{z^{…}}}$ and is it “chaotic” added 223 characters in body Apr 25 revised Existence of an $n\times n$ real matrix $A$ such that $A^2=-I$. added 159 characters in body Apr 25 revised Existence of an $n\times n$ real matrix $A$ such that $A^2=-I$. added 128 characters in body Apr 25 revised Existence of an $n\times n$ real matrix $A$ such that $A^2=-I$. added 96 characters in body Apr 25 revised Relation between Cholesky and SVD typo - the name of the inventor of the method was "Cholesky" Apr 25 revised I have a answer to a question about trace. Is there an easier answer to this question? typo in subject, typos in text Apr 23 revised Show how to calculate the Riemann zeta function for the first non-trivial zero added 509 characters in body Apr 23 revised Show how to calculate the Riemann zeta function for the first non-trivial zero added 893 characters in body Apr 21 revised How does zeta of zero equal to negative one half rather than to infinity? edited tags Apr 6 revised Show/disprove that a system of equations expresses all the natural numbers $\forall\mathbb{N}$ deleted 1 character in body Apr 6 revised Show/disprove that a system of equations expresses all the natural numbers $\forall\mathbb{N}$ attempt to clarify the question for re-opening Apr 5 revised Show/disprove that a system of equations expresses all the natural numbers $\forall\mathbb{N}$ added 107 characters in body Apr 2 revised Exercising divergent summations: $\lim 1-2+4-6+9-12+16-20+\ldots-\ldots$ added 14 characters in body Apr 2 revised Exercising divergent summations: $\lim 1-2+4-6+9-12+16-20+\ldots-\ldots$ edited body Apr 1 revised Divergent sum of factorials added 66 characters in body Apr 1 revised Divergent sum of factorials added 818 characters in body Apr 1 revised Divergent sum of factorials added 818 characters in body Apr 1 revised Divergent sum of factorials added 264 characters in body Apr 1 revised Divergent sum of factorials added 264 characters in body Apr 1 revised Divergent sum of factorials added 42 characters in body