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Re: Limits and Direction

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  • Subject: [mg93828] Re: Limits and Direction
  • From: Szabolcs Horvát <szhorvat at>
  • Date: Wed, 26 Nov 2008 07:21:59 -0500 (EST)
  • Organization: University of Bergen
  • References: <ggj7l1$jad$>

stpatryck wrote:
> Fellow Mathematica Users:
> Why is it that when using the Limit[ ] function, Direction -> 1
> indicates a left hand limit?  This really seems counterintuitive.

Because in mathematics the usual convention is to indicate a left to 
right direction with a positive number.  The number line is oriented 
from left to right, a function with a positive derivative is increasing, 
not decreasing, a vector with components (1,0,0) is the positive 
direction along the x axis, etc.

> Is there a way to switch it?


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