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The equation describes an ellipse, but it is not a standard ellipse because the ellipse's axes are not necessarily parallel to the x and y axes, i.e. it has been rotated. How do you read the angle of rotation from the equation? Widener ( talk) 03:13, 15 May 2011 (UTC)
See
Multiplication#Properties. If a, b, and c are cardinal numbers, does the following still hold?
" Multiplication by a positive number preserves
order: if a > 0, then if b > c then ab > ac. Multiplication by a negative number reverses order: if a < 0 and b > c then ab < ac."
Thanks in advance.
voidnature 08:24, 15 May 2011 (UTC)
Why is S5 a modal companion of CPC? It seems like this should imply that S5 implies the translation of excluded middle, which seems to be , which seems to say there are no contingent propositions - but surely S5 allows for contingent propositions? 88.104.173.35 ( talk) 19:27, 15 May 2011 (UTC)
Oh, this is on the tip of my tongue: I hate when that happens. Begins with "L", I think... I'm trying to remember the name of an algorithm which takes an array of points on a plane and partitions the plane such that each point is surrounded by a polygon - I think the margins of which fall equidistantly with another point (or is it some other definition of "influence"?). The resulting diagram looks like a honeycomb made by tipsy bees. What is that algorithm? (it's not a BSP or its ilk)-- Finlay McWalter ☻ Talk 22:22, 15 May 2011 (UTC)
Mathematics desk | ||
---|---|---|
< May 14 | << Apr | May | Jun >> | May 16 > |
Welcome to the Wikipedia Mathematics Reference Desk Archives |
---|
The page you are currently viewing is an archive page. While you can leave answers for any questions shown below, please ask new questions on one of the current reference desk pages. |
The equation describes an ellipse, but it is not a standard ellipse because the ellipse's axes are not necessarily parallel to the x and y axes, i.e. it has been rotated. How do you read the angle of rotation from the equation? Widener ( talk) 03:13, 15 May 2011 (UTC)
See
Multiplication#Properties. If a, b, and c are cardinal numbers, does the following still hold?
" Multiplication by a positive number preserves
order: if a > 0, then if b > c then ab > ac. Multiplication by a negative number reverses order: if a < 0 and b > c then ab < ac."
Thanks in advance.
voidnature 08:24, 15 May 2011 (UTC)
Why is S5 a modal companion of CPC? It seems like this should imply that S5 implies the translation of excluded middle, which seems to be , which seems to say there are no contingent propositions - but surely S5 allows for contingent propositions? 88.104.173.35 ( talk) 19:27, 15 May 2011 (UTC)
Oh, this is on the tip of my tongue: I hate when that happens. Begins with "L", I think... I'm trying to remember the name of an algorithm which takes an array of points on a plane and partitions the plane such that each point is surrounded by a polygon - I think the margins of which fall equidistantly with another point (or is it some other definition of "influence"?). The resulting diagram looks like a honeycomb made by tipsy bees. What is that algorithm? (it's not a BSP or its ilk)-- Finlay McWalter ☻ Talk 22:22, 15 May 2011 (UTC)