13 lines
445 B
Text
13 lines
445 B
Text
;; grouping
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(for ((i (in-range 2 40 2))) (write (/ (stern i)(stern (1+ i)))))
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→ 1/2 1/3 2/3 1/4 3/5 2/5 3/4 1/5 4/7 3/8 5/7 2/7 5/8 3/7 4/5 1/6 5/9 4/11 7/10
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;; computing f(1), f(f(1)), etc.
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(define (f x)
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(let [(a (/ (- (floor x) -1 (fract x))))]
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(if (> a 1) (f a) (cons a a))))
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(define T (make-stream f 1))
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(for((i 19)) (write (stream-iterate T)))
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→ 1/2 1/3 2/3 1/4 3/5 2/5 3/4 1/5 4/7 3/8 5/7 2/7 5/8 3/7 4/5 1/6 5/9 4/11 7/10
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