2,630 reputation
1628
bio website jakitoimgeisterhaus.blogspot.…
location Munich, Germany
age 37
visits member for 2 years, 10 months
seen 16 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.


Apr
18
answered Which constructions on a category are still interesting for a groupoid?
Apr
18
answered Is a homomorphism expected to be a (structure-preserving) map?
Apr
16
asked Which constructions on a category are still interesting for a groupoid?
Apr
16
asked Is a homomorphism expected to be a (structure-preserving) map?
Apr
11
asked Dimension of embeddings of Segre variety (product of projective spaces)
Apr
10
answered Is the categorical product for projective spaces essentially the tensor product?
Apr
8
answered Are mathematical articles on Wikipedia reliable?
Apr
8
asked Is the categorical product for projective spaces essentially the tensor product?
Mar
19
answered Why are mathematician so interested to find theory for solving partial differential equations but not for integral equation?
Mar
15
answered Estimate loss of information due to a low rank approximization by SVD
Mar
13
answered Why is probability so unintuitive to us?
Mar
11
answered Are these adjoint functors to/from the category of monoids with semigroup homomorphisms?
Mar
9
asked Are these adjoint functors to/from the category of monoids with semigroup homomorphisms?
Mar
6
asked Can the actual scope of “lattice theory” be summarized as “algebraic order theory”?
Feb
3
answered Why are so many of the oldest unsolved problems in mathematics about number theory?
Feb
2
asked Which of these constructions are left adjoints?
Feb
1
answered Mystified by construction of “group extension” $\{G, T\}$ in Herstein's “Topics in Algebra”
Jan
20
answered Relation between concept lattice and Dedekind–MacNeille completion
Jan
14
answered Implication and Interpretation of Banach Tarski
Jan
7
asked Relation between concept lattice and Dedekind–MacNeille completion