My math book updated

I updated my math research book to use “weakly down-aligned” and “weakly up-aligned” instead of “down-aligned” and “up-aligned” (see the book for the definitions) where appropriate to make theorems slightly more general.

During this I also corrected an error. (One theorem referred to complement of a lattice element without stating that the lattice is boolean.)

Well, maybe I introduced new errors. The current version is not 100% stable. However, I am sure the errors (if any) are small and don’t break the exposition.

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