WhoCites Definitions StandardLib Sections NuprlLIB Doc
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Who Cites null?
nullDef null(as) == Case of as; nil  true ; a.as'  false
Thm* T:Type, as:T List. null(as 
Thm* null(nil)  

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listnillist_ind
boolbfalsebtrueuniversememberall!abstraction
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WhoCites Definitions StandardLib Sections NuprlLIB Doc