[tag="-LRB-"] [lemma=□] □ | □
[tag="-LRB-"] [lemma="1/10"] □ | □
[tag="-LRB-"] [lemma=millimeter] □ | □
" These graphs allowed me to study the aesthetic characteristics of functions , sequences , and series in a purely visual language , " Happersett says . Sculpted from wooden strips separated by thin aluminum dividers , each panel consists of an array of wells of equal width but different depths . If you ca n't control your hair pulling and it 's affecting your quality of life , talk to one of your health care providers for help . Health care providers promised to lobby hard to kill the proposals again . Dutch mathematician Bartel L. van der Waerden ( 1903-1996 ) was for one of the first to identify such a pattern among integers - - one that involves arithmetic progressions ( or sequences ) in sets of numbers . Instead , Medicare providers such as hospitals , nursing homes and home care providers would face payment cuts , while higher-income beneficiaries would pay greater premiums . With depths based on specific sequences of numbers rooted in number theory , the wells scatter a broad range of frequencies evenly over a wide angle . Called lavarand , the random-number generator is the tongue-in-cheek work of Robert G. Mende Jr ., Landon Curt Noll , and Sanjeev Sisodiya of Silicon Graphics in Mountain View , Calif. Random numbers are an immensely valuable commodity , not only for the operation of computer-based slot machines but also for computer simulations and for generating the secret strings of digits required to encode and decode sensitive information in cryptographic systems . The branch of pure mathematics known as Ramsey theory concerns the existence of highly regular patterns in sufficiently large sets of randomly selected objects , whether they are gatherings of people , piles of pebbles , stars in the night sky , or sequences of numbers generated by the throw of a die . His moderate stances on issues such as gun control , abortion and gay rights do not sit well with hard-core social conservatives who are a crucial voting group in the nominating contests . One effective acoustic grating is based on quadratic-residue sequences . One major result concerns infinite strings of integers : If the integers are each colored red , green , or blue in such a way that at least one-sixth of the integers has a given color , then there exists a three-term rainbow arithmetic progression among the integers .