| Thread | Last Post | Replies |
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| orthogonal operator | 04 Apr 2007 11:23 GMT | 1 |
Consider an orthogonal NON LINEAR operator B, i.e., B is such that
the
adjoint of B, B* coincides with its inverse, B^{-1} :
B* = B^{-1}.
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| about maximal ideal | 03 Apr 2007 16:43 GMT | 3 |
What is a maximal ideal in the ring of continuous functions from real line to itself which are periodic with period Pi.And is it unique？I am a Chinese,my English is not very well.
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| Differential Equations: Newtons law of cooling | 03 Apr 2007 15:07 GMT | 1 |
I have a differential equation for newtons law of cooling. The general form is:
dX/dt = -k(X-A(t))
where A(t) is the variable temp of the enviroment.
A(t)= 5 - 3cos t(pi/12).
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| Possible Solution to Indeterminite Operation 1^ Infinity | 03 Apr 2007 04:53 GMT | 24 |
1^Infinity is an indeterminite operation, but maybe I found a solution, maybe an explanation, or maybe I made an error. My solution is somewhat elementary, as presented here:
Consider the equation (x = 2):
This can also be interpreted as x = 2(1), due to the identity property.
In ...
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| Ramanujan circle squaring approximation | 02 Apr 2007 16:08 GMT | 5 |
In Approximate geometrical constructions for ?, Quarterly Journal of
Mathematics XLV (1914), 350-374 Ramanujan gave a construction for pi as
(9^2 + 19^2/22)^(1/4).
It's hard for me to access this paper, does anyone know it if this is
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