3,196 reputation
1833
bio website jakitoimgeisterhaus.blogspot.…
location Munich, Germany
age 38
visits member for 3 years, 1 month
seen 13 hours ago

My past research interests included differential algebraic equations, nonlinear analysis and relations between symmetries and structural properties.

I recently investigated hierarchical structures, starting from group cohomology, continuing with semi-group theory and ending with lattices and universal algebra.


Jul
10
reviewed Close Proof that arithmetic mean is greater than geometric mean?
Jun
19
reviewed Looks OK $R[x]$ can be an integral extension of $R$?
Jun
19
reviewed Reject suggested edit on For $R$-modules $M,N$, what are sufficient conditions for $\operatorname{Supp}(M\otimes_R N)\subseteq \operatorname{Supp}(\operatorname{Hom}_R(M,N))$?
Jun
19
reviewed Reject suggested edit on Noetherian ring and prime ideal contained in an invertible maximal ideal.
Jun
19
reviewed Leave Open 3 random numbers to describe point on a sphere
Jun
19
reviewed Leave Open Ring of linear transformations modulo finite rank transformations
Jun
19
reviewed Approve suggested edit on An elegant description for graded-module morphisms with non-zero zero component
Jun
9
reviewed Close Frogs on lotus trees
May
25
reviewed Approve suggested edit on Find a matrix $P$ that orthogonally diagonalizes $A$ and determine $P^{-1}AP$
May
13
reviewed Approve suggested edit on Continuous probability distribution with no first moment but the characteristic function is differentiable
May
13
reviewed Approve suggested edit on Finding expected value of E(Y^2)
May
4
reviewed Approve suggested edit on Completing the Square and Complex Coefficients
May
3
reviewed Approve suggested edit on Proving a circuit of a graph will have an edge in common with a cycle of the same graph.
Mar
11
reviewed Approve suggested edit on Find the conjugacy classes of $D_6$
Jan
24
reviewed Approve suggested edit on Cauchy's Integral Theorem
Jan
15
reviewed Approve suggested edit on Can 18 consecutive integers be separated into two groups,such that their product is equal?
Jan
13
reviewed Approve suggested edit on Using the limit to prove the equivalence between two metrics
Jan
13
reviewed Approve suggested edit on Finding one sided limit
Jan
13
reviewed Approve suggested edit on Convergence of this series which gives no result in root test
Jan
13
reviewed Approve suggested edit on compute probabilities of elements in a sample space