13,571 reputation
11859
bio website go.helms-net.de
location Kassel, Germany
age 62
visits member for 4 years, 4 months
seen 1 hour ago

Mathematics is only a hobby - although I have done undergrad courses in the 70s. But part of my job was doing statistics and this kept me near my favourite subject "linear algebra" (programmed factor-analysis and a matrix-orientated calculator MatMate). Around 2002 I came in contact with the internet community in math newsgroups and could improve my Collatz discussion. Next subject was the Bernoulli numbers, then integer matrices and since 2006 the problem of iterated exponentiation aka tetration. Serving half-time jobs in teaching here at the university I found time to fiddle with that subjects in depth - and found love with the exploratory approach and impulse of the 18'th century numbertheory, namely L. Euler, "the master of us all"... Due to lack of formal education I've to do my "research" widely on my own - but that's what I just like: to find structure, pattern, laws from the ground.


20h
revised Collatz conjecture: Largest number in sequence with starting number n
added 744 characters in body
Jan
23
revised Is there a systematic relation between the generating functions for the rows vs that for columns of infinite sized Carleman-matrices?
added background, reference
Jan
23
revised Is there a systematic relation between the generating functions for the rows vs that for columns of infinite sized Carleman-matrices?
added background, reference
Jan
20
revised Find all matrices where the matrix is its own inverse and the determinant is 1
added 127 characters in body
Jan
19
revised Is there a systematic relation between the generating functions for the rows vs that for columns of infinite sized Carleman-matrices?
added tag "reference request"
Jan
15
revised Find $f \in B[0,2] $ and $g$ Riemann-Stieltjes integrable on $[0,1]$ and $[1,2]$ but not in $[0,2]$
typo
Jan
14
revised a doubt with the series $ \sum_{n=0}^{\infty}e^{-nx} $
added tag
Jan
11
revised Proof of Andrica when Assuming Oppermann
deleted 26 characters in body
Jan
10
revised Borel-/Laplace-transform and $\psi$-function
added 67 characters in body
Jan
10
revised Borel-/Laplace-transform and $\psi$-function
added 67 characters in body
Jan
10
revised Borel-/Laplace-transform and $\psi$-function
added 67 characters in body
Jan
10
revised Why does $1+2+3+\dots = -\frac{1}{12}$?
added 17 characters in body
Jan
8
revised Borel-/Laplace-transform and $\psi$-function
corrected order of indices to $ a_{k,2 }$
Jan
8
revised Borel-/Laplace-transform and $\psi$-function
added 996 characters in body
Jan
8
revised Borel-/Laplace-transform and $\psi$-function
added 996 characters in body
Jan
8
revised Borel-/Laplace-transform and $\psi$-function
added 996 characters in body
Jan
6
revised Prove that the eigenvalues of the Legendre equation are integers
type Strum to Sturm
Jan
6
revised $\sum_{n=0}^{\infty} \frac{1}{2n+1} = 0.66215 + \frac{1}{2}\log(\infty)^{3}$
added 159 characters in body
Jan
6
revised $\sum_{n=0}^{\infty} \frac{1}{2n+1} = 0.66215 + \frac{1}{2}\log(\infty)^{3}$
added 13 characters in body
Jan
6
revised $\sum_{n=0}^{\infty} \frac{1}{2n+1} = 0.66215 + \frac{1}{2}\log(\infty)^{3}$
added 13 characters in body