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Re: Compact formulation of array of constraints

  • To: mathgroup at smc.vnet.net
  • Subject: [mg132216] Re: Compact formulation of array of constraints
  • From: Yi Wang <tririverwangyi at gmail.com>
  • Date: Sun, 19 Jan 2014 02:55:21 -0500 (EST)
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  • References: <laqs5d$1u7$1@smc.vnet.net>

For this example, yo can do

Apply[And, (x[#] >= 0) & /@ Range[5]]

For example,

Assuming[(x[#] >= 0) & /@ Range[5], Simplify[Sqrt[x[2]^2]]]

On the other hand, AFAIK patterns do not work in this situation.

> Dear All,
>
>
>
> How can one formulate the set of constraints
>
>
>
> x[1] >= 0, x[1] >= 0, x[2] >= 0, x[3] >= 0, x[4] >= 0, x[5] >= 0
>
>
>
> by using a compact form?
>
>
>
> Thanks in advance,
>
>
>
> Paul



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