Algoritmi per la soluzione di problemi di assegnazione
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Simbologia
- A, B
∥aik∥, ∥bik∥ (i = 1, ..., n;k = 1, ...,m)
- A≤B
aik≤bik
- G, H
matrici di permutazione rispettivamente di ordinen, m
- g, h
corrispondenti funzioni di permutazione degli indici
- \(A\mathop {\underline \angle }\limits_P B\)
(EG) (EH) (GAH≤B)
- X·Y
∥xikyik∥
- ∥rik, st∥
∥r(i−1)m + k. (s−1)m +t∥ (i, s = 1, ...,n, k, t = 1, ...,m)
- \(\left\| {r_{i\underset{\raise0.3em\hbox{$\smash{\scriptscriptstyle-}$}}{k} , s\underset{\raise0.3em\hbox{$\smash{\scriptscriptstyle-}$}}{t} } } \right\|\)
sottomatrice di ∥rik, st∥ ottenuta fissando\(k = \underset{\raise0.3em\hbox{$\smash{\scriptscriptstyle-}$}}{k} , t = \underset{\raise0.3em\hbox{$\smash{\scriptscriptstyle-}$}}{t}\) (i, s=1, ...,n)
- \(\left\| {r_{\underset{\raise0.3em\hbox{$\smash{\scriptscriptstyle-}$}}{i} k, \underset{\raise0.3em\hbox{$\smash{\scriptscriptstyle-}$}}{s} t} } \right\|\)
« » « ottenuta fissando\(i = \underset{\raise0.3em\hbox{$\smash{\scriptscriptstyle-}$}}{i} , s = \underset{\raise0.3em\hbox{$\smash{\scriptscriptstyle-}$}}{s}\) (k, t = 1, ...,m)
- X ∈ ℋn
(EG) (G≤X)
- Y ∈ ℋm
(EH) (H≤Y)
Summary
An iterative algorithm is proposed to reduce in mast cases the number of permutations necessary for finding possibly solution of the multiple assignement problem for the rows at same time for the columns of two matrices.
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Bibliografia
- [1]A quasi-Decision algorithm for the P-equivalence of two matrices.Corrado Böhm and Adelina Santolini. ICC. vol. 3, n. 1, 1964.Google Scholar
- [2]Some aspects of Analysis and Probability.-Kaplansky, Hewitt, Hall, Fortet. Volume IVSurveys in Applied Mathematics: John Wiley and Sons, Inc., Publishers.Google Scholar
- [3]On representatives of subsets. Ph. Hall-j. London Math. Soc., 10, 26–30 (1935).Google Scholar
- [4]Gotusso, L, Tarsi Santolini A.: A FORTRAN IVquasi-decision algorithm for the P-equivalence of two matrices. Calcolo, vol. V, Fas. I 1968.Google Scholar