Abstract
For special inequalities p ≤ q, where p, q are algebraic expressions such that for p and q corresponding matrices P, Q can be given, proofs can be performed by manipulating the rows of Q, such that the manipulation yields P. The paper gives an Ω with P=Ω(Q) where Ω can be seen as an algorithm in the classical sense because Ω=ω o ω o ... ω and ωis a manipulation of colums of some matrix. Two special manipulations ω < and ω 〉 are presented as <-ordering and >-ordering functions. Furtheron it is shown how P, Q are to be chosen to be corresponding to p, q, i.e. mappings ϕ are given such that p=ϕ(P) and q=ϕ(Q) by example. For those ϕ-s it is shown that p=ϕ(P) ≤ ϕ(Ω(P))=ϕ(Q)=q. Although p, q need to be very special, a lot of capabilities of the introduced ϕ, ω exist, for example it can be proven algorithmically that \(\sqrt[n]{{a_1 a_2 ...a_n }} \leqslant \tfrac{1}{n}\sum\nolimits_{i = 1}^n {a_i } \). Hence the perspectives of the method are, that improvements of the given ϕ, ω could give algorithms for a wider range of inequalities (for example polynomials) to be implemented in some Computer Algebra systems.
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References
Hardy, G., Littlewood, J., Polya, G.: Inequalities, 2nd Edition, Cambridge University Press, Cambridge, 1952.
Mitrinovic, D.: Analytic Inequalities, Die Grundlehren der mathematischen Wissenschaften, Bd. 165, Springer-Verlag, Berlin, 1970.
Mitrinovic, D.: Elementary Inequalities, P. Noordhoff Ltd., Groningen, 1964.
Bottema, O., Djordjevic, R., Janic, R., Mitrinovic, D. and Vasic, P.: Geometric Inequalities, Wolters-Noordhoff Publishing, Groningen, 1969.
Kovacec, A.: Eine Methode zum Nachweis von Ungleichungen auf einheitlicher, algorithmischer Grundlage, Dissertation, Universität Wien, Wien, 1980.
Lawler, E.: Combinatorial Optimization: Networks and Matroids, Holt, Rinehart and Winston, New York, 1976.
Christofides, N.: Graph Theory: An Algorithmic Approach, Academic Press, London, 1975.
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© 1989 Springer-Verlag Berlin Heidelberg
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Ferscha, A. (1989). A matrix-approach for proving inequalities. In: Davenport, J.H. (eds) Eurocal '87. EUROCAL 1987. Lecture Notes in Computer Science, vol 378. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-51517-8_145
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DOI: https://doi.org/10.1007/3-540-51517-8_145
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Online ISBN: 978-3-540-48207-9
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