3,377 reputation
1937
bio website jakitoimgeisterhaus.blogspot.…
location Munich, Germany
age 38
visits member for 3 years, 6 months
seen 4 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.


Oct
21
awarded  Civic Duty
Oct
21
answered What is the importance of lattice based access control?
Oct
21
revised What is lattice with arbitrary suprema called?
corrected typos in last formula
Oct
21
suggested approved edit on What is lattice with arbitrary suprema called?
Oct
19
revised Relation between lattice theory and semilattice theory
edited tags; edited title
Oct
19
comment Terminology for a property that holds in the finite but not infinite case?
I asked a related question, which takes the "any meet semilattice of finite height is also a join semilattice" part to explain the motivation. However, my question also remarks that this statement at least required further clarification, because it is not true in the literal sense.
Oct
19
asked Relation between lattice theory and semilattice theory
Oct
17
comment Is finite group theory still a fruitful area of research?
@JackSchmidt I guess your comment means that it is still a fruitful area of research (because there are so many publications later than 2009), but your link seems to require a subscription.
Oct
17
answered Is finite group theory still a fruitful area of research?
Oct
14
answered Should mean be subtracted before convolution?
Oct
14
comment Should mean be subtracted before convolution?
I missed the "... and pattern" part. This makes the question more interesting, because the meaning of "subtract the mean from the pattern" is ambiguous. Because of this ambiguity, the explanation from my comment doesn't apply to the case were you "subtract the mean from the pattern".
Oct
14
comment Should mean be subtracted before convolution?
The position of the maximum after convolution won't change if you subtract a constant from the signal. The justification is that convolution is linear, and the convolution of a constant function with your continuous pattern is just another constant function.
Oct
9
comment Discete Fourier Transform-Additive Combinatorics
This seems related.
Oct
5
comment Ideas for math projects for a self-studier?
You could take a look at my question regarding zoom-out functionality, then perhaps install KLayout in order to see how the chip design engineer community uses this zoom out functionality. Then you can think about whether that would be something worth having in a program like gnuplot (or matlab), and how you could go about to make it happen (if you care).
Oct
3
reviewed Reviewed What is the single most influential book every mathematician should read?
Sep
26
awarded  Revival
Sep
26
answered Geometric intuition behind the Lie bracket of vector fields
Sep
26
awarded  Custodian
Sep
26
reviewed Reviewed Is it morally right and pedagogically right to google answers to homework?
Sep
26
awarded  Custodian