3,641 reputation
1237
bio website maths.swan.ac.uk/staff/jhg
location Swansea, Wales, UK
age 33
visits member for 4 years, 4 months
seen 22 hours ago
Lecturer at Swansea University. Topologist. Interested in homotopy theory of moduli spaces and operads.

Jul
14
accepted Does the category PCM (partial commutative monoids) have a closed symmetric monoidal product?
Jul
14
comment Does the category PCM (partial commutative monoids) have a closed symmetric monoidal product?
Thanks! That's just what I needed.
Jul
14
asked Does the category PCM (partial commutative monoids) have a closed symmetric monoidal product?
Jul
2
awarded  Curious
Jun
12
answered Étale homotopy type of non-archimedean analytic spaces
May
19
comment Schemes over ℤ with a “graded existence over 𝔽₁”
Peter Arndt and I thought about grassmannians over Durov's F_1. It turns out that one needs to glue along morphisms more general than any of the topologies Durov considers (in particular, morphisms that are not flat but which become flat after base change to any semiring or ring).
Mar
25
awarded  Yearling
Mar
25
awarded  Nice Answer
Feb
24
awarded  Nice Answer
Dec
17
awarded  Popular Question
Nov
23
awarded  Nice Answer
Nov
17
awarded  Nice Answer
Jun
25
awarded  at.algebraic-topology
Apr
27
awarded  Nice Answer
Apr
25
awarded  Nice Question
Apr
24
comment A_infinity structure on cohomology and the weight filtration
Dan, thanks for reminding me about that question - I had forgotten about it. Unfortunately nobody ever gave an answer to that one.
Apr
24
comment A_infinity structure on cohomology and the weight filtration
Jan, even without knowing that smooth projective implies formal, smooth projective implies immediately that weight equals degree.
Apr
24
asked A_infinity structure on cohomology and the weight filtration
Mar
25
awarded  Yearling
Mar
12
comment Which manifolds are homeomorphic to simplicial complexes?
Ciprian Manolescu has just posted a paper in which he claims to prove that no such homology 3-sphere exists. arXiv:1303.2354 Pin(2)-equivariant Seiberg-Witten Floer homology and the Triangulation Conjecture