Talk:Orthogonal array: Difference between revisions

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imported>Andrey Khalyavin
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imported>Paul Wormer
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== Question ==
I have problems understanding your article. For instance, you write:
: Latin squares are <math>OA(n^2,3,n,2)</math>. In order to see this, consider all triples <math>(i,j,s(i,j))</math> where <math>s(i,j)</math> — symbol in i-th row and j-th column in the latic [latin? PW] square. Then <math>n^2</math> such triples for all <math>i,j\in{0,\dots,s-1}</math>
but then in the example ''i'' and ''j'' run from 1 to 3 and do not start at 0. And what is ''s'', is it 3? If so, I find it confusing that you use  ''s'' for the number of "symbols"  and ''s(i,j)'' for the "symbol"  itself. What is the difference between ''n'' and ''s''? Also, the term "symbol" sounds odd to me, would "object"  not be a better word, or is the word symbol standard in this subfield of math?--[[User:Paul Wormer|Paul Wormer]] 06:42, 23 June 2008 (CDT)

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 Definition An array of tuples over an finite alphabet that have every combination of symbols in some sets of coordinates appear equaly often. [d] [e]
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Question

I have problems understanding your article. For instance, you write:

Latin squares are . In order to see this, consider all triples where — symbol in i-th row and j-th column in the latic [latin? PW] square. Then such triples for all

but then in the example i and j run from 1 to 3 and do not start at 0. And what is s, is it 3? If so, I find it confusing that you use s for the number of "symbols" and s(i,j) for the "symbol" itself. What is the difference between n and s? Also, the term "symbol" sounds odd to me, would "object" not be a better word, or is the word symbol standard in this subfield of math?--Paul Wormer 06:42, 23 June 2008 (CDT)