Essays/Inner Products

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Some interesting inner products:

 ~:/ .=  leapyear=: 0 ~:/ .= 4 100 400 |/ ]
 ~:/ .*  inner product in GF(2)
 >./ .+  y >./ .+ __ * x~:/~.x is equivalent to x >.//. y for vectors x and y
 <./ .+  y <./ .+ _   * x~:/~.x is equivalent to x <.//. y for vectors x and y ; see the Transpose essay