2. The apparatus of claim 1 wherein said memory means contains run length coded magnitudes of the vectors representing valid dictionary words followed by the associated absolutely unique angle having a bit indicating whether it is followed by another absolutely unique angle for the same magnitude.
1. A digital reference matrix apparatus for verifying input alpha characters as valid linguistic expressions comprising: detection means for detecting the presence of an alpha word at the input of said apparatus; a conversion memory connected to said detection means for encoding each character in the input alpha word into a numeric value; calculation means connected to said conversion memory for converting the alpha word into a vector having a magnitude ##EQU3## where L.sub.N is the numeric value assigned to each character in the word and an absolutely unique angle ##EQU4## where R.sub.N is a unique number indicating the position of each letter in the alpha word and .vertline.R.vertline. is a vector whose elements are R.sub.N ; memory means containing the dictionary of valid alpha words encoded in accordance with the vector magnitude and angle representation; accessing means connected to said calculation means and said memory means for accessing said memory means for an address equal to the calculated magnitude; compare means connected to said memory means and said calculator means for comparing the calculated angle with the angle stored at the magnitude/address in said memory means; and flag means connected to said memory means and said compare means for producing a signal indicating whether the input alpha word is valid.