Results 231 to 240 of about 219,642 (266)
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The Fascination of the Elementary
The American Mathematical Monthly, 1987This paper is a translation into Danish of a survey article which appeared in Am. Math. Mon. 94, 759-768 (1987; Zbl 0629.52018), which was in turn the text of one of the Hannah Neumann lectures presented at ICME 5. Beginning with Pick's Theorem, it deals with the properties of general, regular, convex, and non-simple lattice polygons in the plane, and ...
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Journal of Philosophical Logic, 1997
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Journal of the Franklin Institute, 1967
Elementary particles are marvelous bits of matter out of which the whole universe is made, including us; each one exhibits everywhere the same properties, whether in the laboratory or in distant galaxies. We know that there are a number of different kinds of these elementary bits of matter interacting and transforming into one another under the ...
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Elementary particles are marvelous bits of matter out of which the whole universe is made, including us; each one exhibits everywhere the same properties, whether in the laboratory or in distant galaxies. We know that there are a number of different kinds of these elementary bits of matter interacting and transforming into one another under the ...
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Nonisomorphic Elementary PBIB's
Biometrical Journal, 1993\textit{D. Rasch} and \textit{G. Herrendörfer} [Rostocker Math. Kolloqu. 8, 71-82 (1978; Zbl 0394.62060)] have introduced the concept of restricted \((v,k)\)-families of balanced incomplete block designs (BIB's) with \(v\) treatments and block size \(k\). For some \(v\) and \(k\) the number of nonisomorphic BIB's in such families are known.
Urban, G., Rasch, D.
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Orthomodularity is not elementary
Journal of Symbolic Logic, 1984In this note it is shown that the property of orthomodularity of the lattice of orthoclosed subspaces of a pre-Hilbert space is not determined by any first-order properties of the relation ⊥ of orthogonality between vectors in . Implications for the study of quantum logic are discussed at the end of the paper.The key to this result is the following ...
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Modal formulas are either elementary or not ΣΔ-elementary
The Journal of Symbolic Logic, 1976In this paper we prove that if L is a set of modal propositional formulas then FR(L) (the class of all frames in which every formula of L holds) is elementary, Δ-elementary or not ΣΔ-elementary. For single modal formulas the second of these cases does not occur.The model theoretic terminology and results used here are from [1].
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The Impact of Technology on Students’ Writing Performances in Elementary Classrooms: A Meta-Analysis
Computers and Education Open, 2022Xue Wen, Shauna Walters
exaly
A Meta-Analysis of the Impact of Technology on Learning Effectiveness of Elementary Students
Computers and Education, 2017Sumedha Chauhan
exaly