On 2014-07-31 22:49:06, Peter Teeson wrote: > David used theta as well. Is that also an available symbol? > i.e. a greek letter not otherwise used by the APL language?
You're probably refering to ⍬. This is not a theta. This symbol is called zilde and it should look like zero with superimposed tilde. It's not specifically related to lambdas. Zilde stands for a numeric vector of zero length (just like '' is a character vector). You can write (0⍴0) instead of ⍬. -k
