There has been considerable interest recently in the subject of patterns in permutations and words, a new branch of combinatorics with its roots in the works of Rotem, Rogers, and Knuth in the 1970s. Consideration of the patterns in question has been extremely interesting from the combinatorial point of view, and it has proved to be a useful language in a variety of seemingly unrelated problems, including the theory of Kazhdan—Lusztig polynomials, singularities of Schubert varieties, interval orders, Chebyshev polynomials, models in statistical mechanics, and various sorting algorithms, including sorting stacks and sortable permutations.
Added by: JustGoodNews | Karma: 4306.26 | Black Hole | 8 September 2011
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CUT & TELL Scissor Stories For Fall
Cut and tell activity book. Original stories, paper plate cut-outs and patterns. Eight stories, step-by-step cutting directions, 2 sizes of reproducible patterns.
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Toddlers Toy Townhouse Play Set: Full-Size Wood Toy Patterns
20 Complete Full-Size Patterns The Toddler's Toy Townhouse play set is easy to cut out and assemble using basic shop tools and assembly techniques. The roof, floor and driveway sections are all the same overall size and are constructed of 1/2" plywood. Any finish grade plywood will work well for this design. The pillars are all 1/2" standard dowel stock. The dowels slip through drilled holes in the floors creating super overall strength. The assembled house is extremely light and sturdy, just right for toddlers.
Quick & Easy Scroll Saw Toy Patterns: Rockin Rollers
You can make an entire fleet of exciting new wood toy Rockin' Rollers with this skillfully designed book of over one dozen full-size patterns. Our 32 page book of Quick & Easy Scroll Saw Toy Patterns for Rockin' Rollers offers a variety of fun toys and puzzles inspired by your all time favorite muscle car and hot rod designs.
