Mathematics

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Papers you should know

John Baez, What We Can Do About Science Journals i.e. about the problem of highly priced science journals.
Donald E. Knuth, Two notes on notation, American Mathematical Monthly Vol. 99 , Issue 5 (May 1992) 403-422

$Young's Lattice$

$Cobweb Poset$

About new class of orderable Directed Acyclic Graphs - KoDAGs for short.

Introduction and few references...

$PG(2,2) Fano$

Elements of Finite Geometry Elementary, Intermediate and Advanced links, books, refs.
On Differential Posets, Joel B. Lewis, Harvard College Thesis