منابع مشابه
Some Problems for Theistic Evolution
Most readers of Perspectives on Science and Christian Faith are acquainted with the terms “young-earth creation,” “old-earth creation,” and “theistic evolution.”1 These reflect the fact that, among Christians in general and within the American Scientific Affiliation in particular, there is considerable disagreement on how to relate the biblical and scientific data on origins. Some feel that the...
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Large time behavior of solutions to abstract differential equations is studied. The corresponding evolution problem is: u̇ = A(t)u+ F (t, u) + b(t), t ≥ 0; u(0) = u0. (∗) Here u̇ := du dt , u = u(t) ∈ H, H is a Hilbert space, t ∈ R+ := [0,∞), A(t) is a linear dissipative operator: Re(A(t)u, u) ≤ −γ(t)(u, u), γ(t) ≥ 0, F (t, u) is a nonlinear operator, ‖F (t, u)‖ ≤ c0‖u‖, p > 1, c0, p are constant...
متن کاملSome problems in topology
Broadly speaking, we may say that analysis situs, or topology, deals with the properties of geometrical figures that remain invariant when the figures are subjected to arbitrary continuous transformations. There are, however, several distinct kinds of analysis situs, because there are several distinct ways of interpreting the physical notion of continuity in mathematical language. For example, ...
متن کاملSome Problems in Growing
Sugar beets are grown for sugar in 22 States—Michigan, Ohio, Indiana, Illinois, Wisconsin, Minnesota, Iowa, Kansas, Nebraska, South Dakota, North Dakota, Colorado, Montana, Texas, New Mexico, Utah, Idaho, Oregon, Washington, Arizona, Wyoming, and California. They are grown in New Mexico, Arizona, Utah, Nevada, California, and Oregon for seed. Almost 20 percent of the national sugar requirem.ent...
متن کاملSome Problems in Combinatorics
Let In = {1, 2, . . . , n} and x : In 7→ R be a map such that ∑ i∈In x(i) ≥ 0. (For any i, its image is denoted by x(i).) Let F = {J ⊂ In : |J | = k, and ∑ j∈J x(j) ≥ 0}. In [25] Manickam and Singhi have conjectured that |F| ≥ ( n−1 k−1 ) whenever n ≥ 4k and showed that the conclusion of the conjecture holds when k divides n. For any two integers r and ` let [r]` denote the smallest positive in...
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ژورنال
عنوان ژورنال: Nature
سال: 1922
ISSN: 0028-0836,1476-4687
DOI: 10.1038/109104a0