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Re: Simplify[expr] bug?

• To: mathgroup at smc.vnet.net
• Subject: [mg53412] Re: [mg53398] Simplify[expr] bug?
• From: Bob Hanlon <hanlonr at cox.net>
• Date: Tue, 11 Jan 2005 01:30:42 -0500 (EST)
• Reply-to: hanlonr at cox.net
• Sender: owner-wri-mathgroup at wolfram.com

All functions must be input with square brackets rather than 
parentheses.  Such as Sin[a].  Sin(a) means a* Sin


Bob Hanlon

> 
> From: Ken Tozier <kentozier at comcast.net>
To: mathgroup at smc.vnet.net
> Date: 2005/01/09 Sun PM 11:04:00 EST
> To: mathgroup at smc.vnet.net
> Subject: [mg53412] [mg53398] Simplify[expr] bug?
> 
> I'm a complete newbie to Mathematica and not a math whiz, but the 
> results I got from the following two equations seems like bugs to me.
> 
> Test 1:
> Running: Simplify[Sin(a) - Sin(b)]
> Yeilds: (a - b)Sin
> 
> Looks like it's treating the function "Sin" like a coefficient
> 
> Test 2:
> Running: Simplify[d/s + Cos(2*¹*v/s) - Cos(2*¹*(v - 1)/s)]
> Yeilds: (d + 2 Cos ¹) / s
> 
> Mathematica completely factors out the variable "v" which is critical 
> to the correct solution.
> 
> Are these bugs or am I making an inadvertent syntax error.
> 
> Thanks,
> 
> Ken Tozier
> 
>