Lambda functions in Shen can be written in classical form. (lambda X X) is the identity function; also written (/. X X). The latter notation allows a shorthand; (lambda X (lambda Y Y)) can be written (/. X Y Y).
(1-) (/. X X) #<FUNCTION :LAMBDA (X) X> (2-) (* 7) #<FUNCTION :LAMBDA (#:Y18379) (multiply #:Y18378 #:Y18379)>
The exact form in which the closure is printed is platform dependent.