Tags » Graphs

A Graphical View of Categories (II): Monos, Epis, Zeros, Groupoids

Monomorphisms and epimorphisms are special sorts of arrows: they are analogues / generalisations of injective and surjective maps (resp.)—except now we do not speak of elements! 255 more words

Reading Notes

A Graphical View of Categories (I)

A category is a directed graph in the sense of Serre—so an ordered 4-tuple whose members are, resp, the vertices (objects), the edges or arrows (morphisms), the initial vertex (domain) and terminal vertex (codomain) functions—with… 255 more words

Reading Notes

Purity of Essence, Mandrake

This is an update to a post I wrote a couple of years ago about the echo chamber that LGF has become.

echo chamber:

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Little Green Footballs

Falling Gas Prices: A Fact-Based Explanation

In America, it can be hard to trust our media due to its insatiable political agenda. For instance, take gas prices: gas is down to a previously-unimaginable $3 or less per gallon. 335 more words

America

Weekend Wanderings 3: My new favourite website – Health Intelligence

My students will tell you – I love data. With my Grade 8s (who are doing the Ontario Gr 9 Canadian Geography course), we recently completed one of my favourite GeoLabs:  data mining to calculate a Quality of Life Index then compare it to HDI. 194 more words

GeoTech

NoSQL and Polyglot Persistence

Historically, at the beginning in Databases We got a lot of cool things, like SQL, persistence, concurrence between transactions and all. But, for example in SQL we got some problems. 273 more words

Clusters

RECENT PACKPOLL SHOWS THAT NC STATE STUDENTS CARE MORE ABOUT DAILY TAR HELL THAN WORLD PEACE

According to a poll conducted by the obscure research program “Pack Poll”, the vast majority of NC State students care more about an annual satiric newspaper “The Daily Tar Hell” rather than an end to war and an institution of harmony. 260 more words

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