Monthly Archives: February 2015

Category theory again

The category theory page here has been much expanded with links to (i) some online lecture notes, and (ii) some books which are freely (and legitimately!) available online in one form or another. I am not at all aiming to … Continue reading

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The Pavel Haas Quartet at the Wigmore Hall

To the Wigmore Hall again last week to see hear the Pavel Haas Quartet playing Czech music old and new. The most engaging concert, we agreed, that we’d been to for months. Superlatives are in order! To begin, Dvorak’s four … Continue reading

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Notes on Category Theory v.4

I wasn’t able to do much work in January for family reasons, but levels of concentration and energy are returning. So, much later than I’d hoped, here at last is an updated version of the Notes on Category Theory (still very partial … Continue reading

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What is the category Set?

We all know that we quickly encounter issues of size when we start category theory. Categories, we are told, are collections of objects and morphisms satisfying certain axioms. But we very soon meet, among our very first examples of categories, categories like … Continue reading

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The Takács, in Cambridge

Out last night to hear the Takács Quartet at the Peterhouse Theatre here in Cambridge (which seats under 200, has a wonderful acoustic, and must be one of the very best places to hear chamber music in England). I hugely … Continue reading

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