Matematicky symbol || ?

[balu@home]

paralelne


On Apr/4/2012 9:56, Jiří Kučera wrote:
> Nevite jaky vyznam ma tento matematicky symbol || ?
> V geometrii by slo o rovnobeznost, ale on je pouzit ve vyrazu
> napriklad
> Q=1+R2/(R1||R2)\
>
> Jirka
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