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・ Sum of Parts
・ Sum of perpetuities method
・ Sum of public power
・ Sum of radicals
・ Sum of squares
・ Sum of the Parts
・ Sum of two squares theorem
・ Sum Practysis of Medecyne and other Short Works
・ Sum rule
・ Sum rule in differentiation
・ Sum rule in integration
・ Sum rule in quantum mechanics
・ Sum to Infinity
・ Sum to Infinity (book)
・ Sum Ying Fung
Sum-free sequence
・ Sum-free set
・ Sum-frequency generation
・ Sum-of-squares optimization
・ Sum-of-the-parts analysis
・ Sum-product number
・ Sum/One
・ Suma
・ Suma (co-operative)
・ Suma (moth)
・ Suma Bhattacharya
・ Suma Chakrabarti
・ Suma Gestión Tributaria
・ Suma Josson
・ Suma Kanakala


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Sum-free sequence : ウィキペディア英語版
Sum-free sequence
In mathematics, a sum-free sequence is an increasing positive integer sequence
:\_
such that for each k, n_k cannot be represented as a sum of any subset of the preceding elements of the same sequence.
The definition of sum-free sequence is different of that of sum-free set, because in a sum-free set only the sums of two elements must be avoided, while a sum-free sequence must avoid sums of larger sets of elements as well.
==Example==
The powers of two,
:1, 2, 4, 8, 16, ...
form a sum-free sequence: each term in the sequence is one more than the sum of all preceding terms, and so cannot be represented as a sum of preceding terms.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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