Give a recursive definition for the set X of all natural numbers that are one or two more than a multiple of 10. In other words, give a recursive definition for the set (1, 2, 11, 12, 21, 22, 31, 32,...}. B₁. 1 is in X. B₂. R. If xEX, so is is in X.

Database System Concepts
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ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
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Give a recursive definition for the set X of all natural numbers that are one or two more than a multiple of 10. In other words, give a recursive definition for the set {1, 2, 11, 12, 21, 22, 31, 32, ...}.
B₁. 1 is in X.
B₂.
R.
If XE X, so is
is in X.
Transcribed Image Text:Give a recursive definition for the set X of all natural numbers that are one or two more than a multiple of 10. In other words, give a recursive definition for the set {1, 2, 11, 12, 21, 22, 31, 32, ...}. B₁. 1 is in X. B₂. R. If XE X, so is is in X.
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