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From: J. Clarke on 12 Jun 2010 05:31
On 2/25/2010 1:52 AM, Helen Read wrote:
> On 2/24/2010 6:21 AM, ibmichuco(a)hotmail.com wrote:
>>
>>
>> Sigh,
>>
>> I don't want a copy of Mathematica on a PDA, as I mentioned
>> at the beginning of the post, much less an app for cloud computing.
>>
>> I want neither a calculator with augmented reality nor one that
>> toasts bread. Just a a hand held calculator that gives a quick
>> check to, say
>>
>> Cos[t] D[Sin[t]/r D[F[r, t], t], r]
>>
>> with
>>
>> (0,1) (1,1)
>> Sin[t] F [r, t] Sin[t] F [r, t]
>> Out[1]= Cos[t] (-(-------------------) + -------------------)
>> 2 r
>> r
>>
>> regardless if I am online or not.
>
> You do know about the TI-89, right? It's a hand-held calculator that
> does symbolic computations. I believe the underlying engine is based on
> a different CAS (oh, another one that starts with an M), but this is
> pretty much transparent to the user.

The other alternative in a handheld is the HP-48 and its successors. Of
the two, the HP has arguably better performance but the TI seems more
reliable.

There are emulators for both that run on a variety of other handhelds.


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