Producer Exploration can Generate Categories without Audiences

Social audiences can disrupt learning by teaching

Triangulated categories without models

We exhibit examples of triangulated categories which are neither the stable category of a Frobenius category nor a full triangulated subcategory of the homotopy category of a stable model category. Even more drastically, our examples do not admit any non-trivial exact functors to or from these algebraic respectively topological triangulated categories. Introduction. Triangulated categories are ...

Syntax without functional categories

This paper argues against the notion 'functional category' (a kind of word-class) while accepting that individual words may be described as 'function' words or 'content' words. It focuses on the two least controversial examples of functional categories — 'determiner' and 'complementiser' — and argues that neither of these categories is needed; and if this conclusion is correct, there is even le...

Categories without structures

Can cyanobacteria be a potential PHA producer?

Polyhydroxyalkanoates (PHAs) are microbial polyesters produced by various microorganisms. Many of these bacteria when fed with suitable carbon sources can produce PHAs up to about 30 wt% of the cell dry weight (CDW) and a few such as Ralstonia eutropha can accumulate PHAs up to almost 90 wt% of the CDW. In cyanobacteria (blue-green algae), the PHA content is usually about 5 wt% of the CDW. In t...