funcoid
Several ways to apply a (multivalued) multiargument function to a family of filters ★★★
Author(s): Porton
1. The funcoid corresponding to this function (considered as a single argument function on indexed families) applied to the reloidal product of filters .
2. The funcoid corresponding to this function (considered as a single argument function on indexed families) applied to the starred reloidal product of filters .
3. .
Keywords: funcoid; function; multifuncoid; staroid
Direct proof of a theorem about compact funcoids ★★
Author(s): Porton
The main purpose here is to find a direct proof of this conjecture. It seems that this conjecture can be derived from the well known theorem about existence of exactly one uniformity on a compact set. But that would be what I call an indirect proof, we need a direct proof instead.
The direct proof may be constructed by correcting all errors an omissions in this draft article.
Direct proof could be better because with it we would get a little more general statement like this:
- \item ; \item .
Then .
Keywords: compact space; compact topology; funcoid; reloid; uniform space; uniformity
Distributivity of a lattice of funcoids is not provable without axiom of choice ★
Author(s): Porton
A similar conjecture:
Keywords: axiom of choice; distributive lattice; distributivity; funcoid; reverse math; reverse mathematics; ZF; ZFC
Distributivity of inward reloid over composition of funcoids ★★
Author(s): Porton
Keywords: distributive; distributivity; funcoid; functor; inward reloid; reloid
Reloid corresponding to funcoid is between outward and inward reloid ★★
Author(s): Porton
Keywords: funcoid; inward reloid; outward reloid; reloid
Distributivity of union of funcoids corresponding to reloids ★★
Author(s): Porton
Keywords: funcoid; infinite distributivity; reloid
Inward reloid corresponding to a funcoid corresponding to convex reloid ★★
Author(s): Porton
Keywords: convex reloid; funcoid; functor; inward reloid; reloid
Outward reloid corresponding to a funcoid corresponding to convex reloid ★★
Author(s): Porton
Keywords: convex reloid; funcoid; functor; outward reloid; reloid
Distributivity of outward reloid over composition of funcoids ★★
Author(s): Porton
Keywords: distributive; distributivity; funcoid; functor; outward reloid; reloid
Funcoid corresponding to inward reloid ★★
Author(s): Porton
Keywords: funcoid; inward reloid; reloid