Re: (may o r may not be on topi c) Floatin g point ar ithmetic‏

2010-05-06 Thread john gilmore
First, some terminological clarification: o BFP is IEEE-standard binary floating point; o DFP is IEEE-standard decimal floating point; and o HFP is IBM-standard hexadecimal floating point. To repeat myself now, both BFP and DFP are IEEE-standard. Next, some very basic mathematic

Re: (may o r may not be on topi c) Floatin g point ar ithmetic‏

2010-05-04 Thread john gilmore
ALGOL 68 had such a data type, but it proved to be highly problematic. Available storage was exhausted attempting to determine just how long the longest representation of a long...long value could be. John Gilmore Ashland, MA 01721-1817 USA __

Re: (may o r may not be on topi c) Floatin g point ar ithmetic‏

2010-05-04 Thread john gilmore
Paul, Briefly, as the polynomials having real, integral coeffficients are countable/enumerable, so their zeros, the algebraic numbers, are countable too. The transcendentals, on the other hand, are not countable; and they are thus much more numerous in Cantor's sense than the algebraic number

Re: (may o r may not be on topi c) Floatin g point ar ithmetic‏

2010-05-04 Thread john gilmore
Numbers like sqrt(2) are irrational, i.e., not expressible as a fraction having an integer numerator and denominator. Numbers like "pi and e" are transcendental. They are a very different kettle of fish. Rational numbers have decimal-fraction representations that are either terminatin