25 lines
877 B
Factor
25 lines
877 B
Factor
USING: help.markup help.syntax math ;
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IN: math.analysis
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HELP: gamma
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{ $values { "x" number } { "y" number } }
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{ $description "Gamma function; an extension of factorial to real and complex numbers." } ;
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HELP: gammaln
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{ $values { "x" number } { "gamma[x]" number } }
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{ $description "An alternative to " { $link gamma } " when gamma(x)'s range varies too widely." } ;
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HELP: nth-root
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{ $values { "n" integer } { "x" number } { "y" number } }
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{ $description "Calculates the nth root of a number, such that " { $snippet "y^n=x" } "." } ;
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HELP: exp-int
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{ $values { "x" number } { "y" number } }
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{ $description "Exponential integral function." }
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{ $notes "Works only for real values of " { $snippet "x" } " and is accurate to 7 decimal places." } ;
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HELP: stirling-fact
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{ $values { "n" integer } { "fact" integer } }
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{ $description "James Stirling's factorial approximation." } ;
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