A sparse ruler is called optimal if it is both minimal and maximal. Since the number of distinct pairs of marks is m ( m â 1 ) / 2 {\displaystyle m(m-1)/2} , this is an upper bound on the length L {\displaystyle L} of any maximal sparse ruler with m {\displaystyle m} marks.
1 One 23/32-inch 4x8-foot plywood piece weighs approximately 67 pounds, while a piece of OSB of the same dimensions weighs approximately 78 pounds.
MAPEI- Lightweight Ultrabond 975 Engineered Wood-Flooring Adhesive is urethane based. OSB (Subfloor grade) is an excellent substrate for glue-down of Engineered hardwood floors. Thank you for your interest in our flooring products.