A Short Proof of Jacobi's Formula for the Number of Representations of an Integer as a Sum of Four Squares
A short proof of the tree-packing theorem
A Short Proof of the VPN Tree Routing Conjecture on Ring Networks
A Short Proof of the Zeilberger-Bressoud $q$-Dyson Theorem
A short proof that ``proper = unit''
A short simplicial h-vector and the upper bound theorem
A short, based on the mixed volume, proof of Liggett's theorem on the convolution of ultra-logconcave sequences
A Shorter Proof of the Transitivity of Transfinite Connectedness
A shorter, simpler, stronger proof of the Meshalkin-Hochberg-Hirsch bounds on componentwise antichains
A sign-reversing involution for rooted special rim-hook tableaux
A simple and unusual bijection for Dyck paths and its consequences
A simple approach to q-Chebyshev polynomials
A simple approach to some Hankel determinants
A simple bijection between alternating sign matrices with no -1's and descending plane partitions with no special parts
A simple bijection between binary trees and colored ternary trees
A simple bijection between permutation tableaux and permutations
A simple bijection between standard (n,n,n) tableaux and irreducible webs for sl_3
A Simple Bijection for the Regions of the Shi Arrangement of Hyperplanes
A Simple Bijective Proof of the Shape-Wilf-Equivalence of the Patterns 231 and 312
A Simple Combinatorial Criterion for Projective Toric Manifolds with Dual Defect