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> From: Aubrey Jaffer <agj@xxxxxxxxxxxx> > procedure #i-/0 #i+/0 > ========= ===== ===== > > floor error 179.76931348623157e306 > > ceiling -179.76931348623157e306 error > > truncate -179.76931348623157e306 179.76931348623157e306 > > round -179.76931348623157e306 179.76931348623157e306 - it's not clear this is necessarily desirable? As upon further thought it seems most reasonable that infinities return infinities, or optionally throw an exception, for all such scenarios to be most consistent? (As otherwise the marginal error resulting from the conversion may be infinite itself which seems inconsistent with the expectations of the conversion.) If so, and correspondingly that: (= (floor x) (/ (ceiling (/ x)))), then (= #i-/0 (/ #i-0)), (= #i+/0 (/ #i+0)), (= 0 (/ 0)); again seemingly implying the necessity of something along the lines of: -1.0 -10. -1/0 +1/0 +10. +1.0 -------------- 0 -------------- -1.0 -0.1 -0/1 +0/1 +0.1 +1.0 [it would seem? although won't try to sell the thought any further.]