Re: Simplify with NestedLessLess?

• To: mathgroup at smc.vnet.net
• Subject: [mg106532] Re: Simplify with NestedLessLess?
• From: dh <dh at metrohm.com>
• Date: Fri, 15 Jan 2010 03:21:21 -0500 (EST)
• References: <himsqd\$jd0\$1@smc.vnet.net> <4B4F126E.4010304@metrohm.com> <4B4FAB01.1080604@ieee.org>

```Hi Dave,
the simplest you can do is to use a user defined function.
If you want to define a infix operator, look at the docu of the Notation
package, but this is not a topic I would tackle as a beginner.
Daniel

Dave Bird wrote:
> Thanks Daniel for the info.
>
> How does one "design a new operator" which Simplify could use as an
> assumption. I'm a Mathematica newby, so please excuse my ignorance.
>
> Thanks again,
>
> Dave
>
> dh wrote:
>> Hi Dave,
>> << does not have a meaning in mathematica. It is only a symbol.
>> Therefore your expression is not simplified.
>> You may define a new operator for your purposes.
>> Daniel
>>
>> dbird wrote:
>>> Please excuse if this has been answered before, but I can't find it.
>>>
>>> Is there some way to do a Simplify with assumptions using a
>>> NestedLessLess or something similar? For example:
>>>
>>> d=a+b
>>> Simplify[d,NestedLessLess[a,b]]
>>>
>>> a+b
>>>
>>> b
>>>
>>> Thanks,
>>>
>>> Dave
>>>
>>
>>
>>
>
>
>

--

Daniel Huber
Metrohm Ltd.
Oberdorfstr. 68
CH-9100 Herisau
Tel. +41 71 353 8585, Fax +41 71 353 8907
E-Mail:<mailto:dh at metrohm.com>
Internet:<http://www.metrohm.com>

```

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