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logarithm

Defines: 
base, natural logarithm, ln, log
Type of Math Object: 
Definition
Major Section: 
Reference
Groups audience: 

Mathematics Subject Classification

26A09 no label found26A06 no label found26-00 no label found

Comments

Some authors state that the case x=1 is to be excluded from the logarithm function domain.

log_b(x) = log(x)/log(b). Since log(1) = 0, it isn't possible to have a logarithm to base 1. Another way to see this is to note that 1^x = 1.

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