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The problem of time in parametrized theories

✍ Scribed by Fabián H. Gaioli; Edgardo T. Garcia-Alvarez


Publisher
Springer US
Year
1994
Tongue
English
Weight
404 KB
Volume
26
Category
Article
ISSN
0001-7701

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Two problems of number theory in Islamic
✍ J. Sesiano 📂 Article 📅 1991 🏛 Springer-Verlag 🌐 English ⚖ 216 KB

Let a(n) denote the sum of the positive divisors of the integer n and s(n) the sum of its aliquot parts, that is, of the divisors of n other than n itself; then, Greek mathematicians had considered the problem of the determination of a perJect number (z~.~o~ do~6~), that is, a number n such that s(