4C. Test

`d0=: -:&(/:~)`	Are x and y permutations of each other?
`m1=: /:~-:i.@#`	Is y a permutation vector?
`m2=: -:-@\|:`	Is y antisymmetric?
`m3=: -:\|:`	Is y symmetric?
`m4=: [:+./[:*./]=/0 1"_`	Are all atoms of Boolean list y equal?
`m5=: *./ .= +./`	Are all atoms of Boolean list y equal?
`m6=: ./ .= ./`	Are all atoms of Boolean list y equal?
`d7=: -.@(] <:/ .>: >.@] , [)"1`	Is y in the half open on the right interval x and is it an integer?
`d8=: e.`	Is list x a row of array y?
`m9=: *./@(= >./\)`	Are columns of y in ascending order?
`m10=: *./@(= <./\)`	Are columns of y in descending order?
`m11=: >./=<./`	Are atoms of numerical list y equal?
`m12=: *./ +. -.@(+./)`	Are atoms of Boolean list y equal?
`m13=: *./ = +./`	Are atoms of Boolean list y equal?
`m14=: *./@(= {.)`	Are atoms of list y equal?
`m15=: 0:=#\|+/`	Are atoms of Boolean list y equal?
`m16=: *./@(#1&\|.)`	Are atoms of Boolean list y equal?
`m17=: ([:,:0:,#)-: v19"_ rxmatch ]`	Is y a legal J name?
`d18=: rxmatch=: 17!:0`	to get rxmatch
`v19=: 'alpha:[[:alnum:]_]* '"_`	'regex' to get alpha: and alnum:

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