040000 tree d7540a3aa58f914dd903eaf418b54855a76ec0f2	combinatorics
040000 tree 5db170485a93434d9c0322566b8a6d7cd12e69b5	electrodinamica
040000 tree 0c646f6ed10eeb2baae45870c39ae6b2a2675bd8	galois
100644 blob e5522aa4d429d6fe24e1a1375ba4b9bd4c957338	hw_preamble.tex