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    • stub for module spectrum. Just the general \infty-abstract perspective so far.

    • have created a stub for supersymmetric quantum mechanics

      Zoran, I see that you once dropped a big query box at quantum mechanics with a complaint. I disagree with the point you make there: we have fundamental definitions of quantum field theory and restricting them to 1 dimension gives quantum mechanics. If you want to turn this around and understand all QFTs as infinite-dimensional quantum mechanics (which, yes, one can do) you are discarding the nice conceptual models and kill the concept of extended QFT.

      In any case, I think remarks like this (in the style of “we can also regard this the other way round like this”) are better added into an entry as what they are – remarks – than as query boxes that give the impression that there is something fishy about the rest of the entry.

    • added an Examples-section (here) “In 2d gravity on String worldsheets”

      diff, v3, current

    • creating a stub entry, following the discussion here

      v1, current

    • I found the section-outline of the entry distribution was a bit of a mess. So I have now edited it (just the secion structure, nothing else yet):

      a) There are now two subsections for “Operations on distributions”,

      b) in “Related concepts” I re-titled “Variants” into “Currents” (for that’s what the text is about) and gave “Hyperfunctions and Coulombeau distributions” its own subsection title.

      c) split up the References into “General” and “On Coulombeau functions”.

      (I hope that this message is regarded as boring and non-controversial.)

    • For ease of linking to from various entries, and in order to have all the relevant material in one place, I am creating an entry

      Presently this contains

      1. an Idea-section,

      2. some preliminaries to set the scene,

      3. the statement and proof for the case of compactly supported distributions, taken from what I had just writted into the entry compactly supported distribution,

      4. the informal statement for general distributions, so far just with a pointer to Kock-Reyes 04,

      5. a section “Applications”, so far with

        1. some comments on the relevance in pQFT;

        2. some vague pointer to Lawvere-Kock’s generalization to a more general theory of “extensive quantity”

        both of which deserve to be expanded.

      Eventually I want to have more details on the page, but I’ll leave it at that for the time being. Please feel invited to join in.

      I’ll go now and add pointers to this page from “distribution” and from other pages that mention the fact.

    • Added Simpson’s thesis on Intuitionistic Modal Logics

      Valeria de Paiva

      diff, v21, current

    • Added how small categories can be thought of as semigroups.


      diff, v22, current

    • created a minimum at function monad (aka “reader monad”, “environment monad”)

    • I added to field a mention of some other constructive variants of the definition, with a couple more references.

    • concerning the discussion here: notice that an entry rig category had once been created, already.

    • I have added this quote attributed to Kazhdan:

      Physics is very interesting: There are many, many interesting theorems. Unfortunately,there are no definitions.

      But does anyone have an authorative reference for this quote?

      It’s attributed this way in

      but neither of these gives any further details (such as: “As overheard over coffee break at ABC.” or “As quoted on XYZ’s webpage.”)

      diff, v5, current

    • Added reference to an article by Langlands.

      • Robert Langlands, Funktorialität in der Theorie der automorphen Formen: Ihre Entdeckung und ihre Ziele, in Emil Artin and beyond — class field theory and L-functions, European Math. Soc., 2015, pp. 175–209. Translated by James Milne as Functoriality in the theory of automorphic forms: its discovery and aims, (pdf)

      diff, v3, current

    • I asked a question on multiset.

      If X = \{1,1,2\} and Y = \{1,1,3\}, is X\cap Y = \{1,1\}?