description: to-coeff ket replace the ket text with ' ' ie, only keep the coefficient examples: -- if the ket is the don't know ket, return the don't know ket: to-coeff 12|> |> to-coeff 26|a: b> 26| > -- since the ket text is now the same, the coefficients add up: to-coeff (26|a: b> + 13|x>) 39| > -- another longer example: to-coeff (3|a: b: c> + 5|x: y> + 7|fish> + 2.5|animal: mammal: cat>) 17.5| > see also: