Some are of the opinion that blogs add noise to the internet and make good information harder to find. There certainly is something to this view, but I think by and large blogs are to the good, when done well. What I somehow *miss, *especially in the mathematical blogosphere, are *compressing and summarizing* reports or, so to speak, *reading-logs.*

I am surprised that this seems not to exist as a sort-of-a-subgenre of mathematical blogging. Of course, the default mode of mathematical blogging are almost-complete mathematical expositions, but I am missing a genre of the type “I am reading this or that article or blog-post (given with full explicit references and credits to the original), and now I am compressing and summarizing it here, with *a* *rather strong compression* ratio, and am doing so openly for the benefit of the occasional reader searching for this or that article or blog post.”

If * became a common subgenre, there could be something of a golden age, with a differential of posts of increasing compression ratio, that readers can select from.* Of course, to some extent, many blog posts are like that, but to me it does not seem a *recognizable genre* of mathematical blog-post. So I will, now and then, try to write such posts.

To remind me and others, in such posts:

- Hardly ever anything evaluative is written.
- The English is more or less in telegraphic style, often omitting articles.
- There is one reference-to-be-summarized, given at the top, and later referenced by “loc. cit.”. Of course, other references can be used in the course of the summary.

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