Re: Bug 1+4/10

*To*: mathgroup at smc.vnet.net*Subject*: [mg120063] Re: Bug 1+4/10*From*: "slawek" <slawek at host.pl>*Date*: Thu, 7 Jul 2011 07:32:00 -0400 (EDT)*References*: <201107060940.FAA29406@smc.vnet.net> <iv1fj0$vp$1@smc.vnet.net>

U¿ytkownik "Patrick Scheibe" <pscheibe at trm.uni-leipzig.de> napisa³ w wiadomo¶ci grup dyskusyjnych:iv1fj0$vp$1 at smc.vnet.net... > please, before make a posting like that make sure you have understood > the basics of how numbers are stored in a computer. You should notice, that Mathematica is not Visual Basic, but a computer algebra program. > You could have used the subject "unexpected behavior" and the body > should have contained something like "I don't understand.." or "can > someone > explain...", but this is purely offensive so I won't comment it. If Mathematica answer that a == b is true, then Mathematica should also answer that N[a] == N[b] is true. It is trivial. You can, poor boy, check that 1.4 == 1+1/4 gives True, but N[1.4, 30] gives different result than N[1+1/4, 30] . It is not good for "the most advanced computer algebra program". Nevertheless, it is not very bad for your Visual Basic programs, which operates on 56 bits of the mantissa. q.e.d.

**References**:**Bug 1+4/10***From:*"slawek" <slawek@host.pl>