منابع مشابه
Q & A with Dr. Stanley Aronson on Butler Hospital’s First Endowed Chair.
Butler Hospital inaugurated its first endowed chair, The Aronson Chair for Neurodegenerative Disorders on April 12 at a celebration held at the Providence Marriott. Pictured from left, Gale Aronson, Dr. Stanley M. Aronson, Butler’s President Patricia Recupero, MD, JD; and the inaugural Chair, Joseph H. Friedman, MD. PROVIDENCE – Following the recent celebration of The Aronson Chair for Neurodeg...
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Alfred North Whitehead (1861-1947) never wrote a comprehensive work in philosophy of education, but he occasionally delivered lectures concerned with educational policy. These incisive talks are collected in his book The Aims of Education and Other Essays. Whitehead and Dewey were contemporaries, and their ideas are in some notable respects similar. Like Dewey, Whitehead stresses the importance...
متن کاملWhitehead Test Modules
A (right R-) module N is said to be a Whitehead test module for projectivity (shortly: a p-test module) provided for each module M , ExtR(M,N) = 0 implies M is projective. Dually, i-test modules are defined. For example, Z is a p-test abelian group iff each Whitehead group is free. Our first main result says that if R is a right hereditary non-right perfect ring, then the existence of p-test mo...
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Even though the (untwisted) Whitehead doubling operation kills all known abelian invariants of knots (and makes them topologically slice), we show that it does not kill the rational function that equals to the 2-loop part of the Kontsevich integral.
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ژورنال
عنوان ژورنال: Nature
سال: 1956
ISSN: 0028-0836,1476-4687
DOI: 10.1038/1771060a0