: Prehistoric and Primitive Man . Andreas Lommel.
نویسندگان
چکیده
منابع مشابه
Symbolism in prehistoric man.
The aptitude for symbolization, characteristic of man, is revealed not only in artistic representations and funerary practices. It is exhibited by every manifestation of human activity or representation of natural phenomena that assumes or refers to a meaning. We can recognize functional symbolism (tool-making, habitative or food technology), social symbolism, (language and social communication...
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In this paper we present interpretations of Lommel polynomials and their derivatives. A combinatorial interpretation uses matchings in graphs. This gives an interpretation for the derivatives as well. Then Lommel polynomials are considered from the point of view of operator calculus. A step-3 nilpotent Lie algebra and finite-difference operators arise in the analysis.
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متن کاملThe Zeros of Certain Lommel Functions
Lommel’s function sμ,ν(z) is a particular solution of the differential equation z2y′′ + zy′ + (z2 − ν2)y = zμ+1. Here we present estimates and monotonicity properties of the positive zeros of sμ−1/2,1/2(z) when μ ∈ (0, 1). The positivity of a closely related integral is also considered.
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ژورنال
عنوان ژورنال: American Anthropologist
سال: 1967
ISSN: 0002-7294,1548-1433
DOI: 10.1525/aa.1967.69.6.02a00680