A conjecture about multifuncoids and ultrafilters is proved

I’ve proved the following conjecture: Theorem Let $latex f$ be a staroid such that $latex (\mathrm{form}\, f)_i$ is an atomic lattice for each $latex i \in \mathrm{arity}\, f$. We have $latex \displaystyle L \in \mathrm{GR}\, f \Leftrightarrow \mathrm{GR}\, f \cap \prod_{i \in \mathrm{dom}\, \mathfrak{A}} \mathrm{atoms}\, L_i \neq \emptyset $ for every $latex L \in \prod_{i […]

What are hyperfuncoids isomorphic to?

Let $latex \mathfrak{A}$ be an indexed family of sets. Products are $latex \prod A$ for $latex A \in \prod \mathfrak{A}$. Hyperfuncoids are filters $latex \mathfrak{F} \Gamma$ on the lattice $latex \Gamma$ of all finite unions of products. Problem Is $latex \bigsqcap^{\mathsf{FCD}}$ a bijection from hyperfuncoids $latex \mathfrak{F} \Gamma$ to: prestaroids on $latex \mathfrak{A}$; staroids on […]

Funcoids are Filters article

I have completed preliminary error checking for my online article Funcoids are Filters. This article is a major step forward in the theory of funcoids.

Category theoretical generalization of reloids and funcoids

While walking home from McDonalds I conceived the following idea how we can generalize reloids and funcoids. Let $latex C$ be a category with finite products, the set of objects of which is a complete lattice (for the case of funcoids as described below it is enough to be just join-semilattice). One can argue which […]

Two new theorems

I’ve proved the theorem: Theorem $latex f \mapsto \bigsqcap^{\mathsf{RLD}} f$ and $latex \mathcal{A} \mapsto \Gamma (A ; B) \cap \mathcal{A}$ are mutually inverse bijections between $latex \mathfrak{F} (\Gamma (A ; B))$ and funcoidal reloids. These bijections preserve composition. (The second items is the previously unknown fact.) and its consequence: Theorem $latex (\mathsf{RLD})_{\Gamma} g \circ (\mathsf{RLD})_{\Gamma} […]

Yahoo! I’ve proved this conjecture

Theorem $latex (\mathsf{RLD})_{\mathrm{in}} (g \circ f) = (\mathsf{RLD})_{\mathrm{in}} g \circ (\mathsf{RLD})_{\mathrm{in}} f$ for every composable funcoids $latex f$ and $latex g$. See proof in this online article.

Two conjectures proved

In this online article I’ve proved: Theorem $latex \mathrm{dom}\, (\mathsf{RLD})_{\mathrm{in}} f = \mathrm{dom}\, f$ and $latex \mathrm{im}\, (\mathsf{RLD})_{\mathrm{in}} f = \mathrm{im}\, f$ for every funcoid $latex f$. and its easy consequence: Proposition $latex \mathrm{dom}\, (\mathsf{RLD})_{\Gamma} f = \mathrm{dom}\, f$ and $latex \mathrm{im}\, (\mathsf{RLD})_{\Gamma} f = \mathrm{im}\, f$ for every funcoid $latex f$.

Yet three conjectures

Conjecture $latex \mathrm{dom}\, (\mathsf{RLD})_{\Gamma} f = \mathrm{dom}\, f$ and $latex \mathrm{im}\, (\mathsf{RLD})_{\Gamma} f = \mathrm{im}\, f$ for every funcoid $latex f$. Conjecture $latex (\mathsf{RLD})_{\Gamma} g \circ (\mathsf{RLD})_{\Gamma} f = (\mathsf{RLD})_{\Gamma} (g \circ f)$ for every composable funcoids $latex f$ and $latex g$. Conjecture For every funcoid $latex g$ we have $latex \mathrm{Cor}\, (\mathsf{RLD})_{\Gamma} g = […]

A new theorem and a conjecture

I’ve just proved the following: Theorem $latex (\mathsf{FCD}) (\mathsf{RLD})_{\Gamma} f = f$ for every funcoid $latex f$. For a proof see this online article. I’ve also posed the conjecture: Conjecture $latex (\mathsf{FCD}) : \mathsf{RLD} (A ; B) \rightarrow \mathsf{FCD} (A ; B)$ is the upper adjoint of $latex (\mathsf{RLD})_{\Gamma} : \mathsf{FCD} (A ; B) \rightarrow […]

Some new definitions, propositions, and conjectures

I added to this online article the following definitions, propositions, and conjectures: Definition $latex \boxbox f = \bigsqcap^{\mathsf{RLD}} \mathrm{up}^{\Gamma (\mathrm{Src}\, f ; \mathrm{Dst}\, f)} \, f$ for reloid $latex f$. Obvious $latex \boxbox f \sqsupseteq f$ for every reloid $latex f$. Example $latex (\mathsf{RLD})_{\Gamma} f \neq \boxbox (\mathsf{RLD})_{\mathrm{out}} f$ for some funcoid $latex f$. Conjecture […]