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- bigvlada replied Jul 15, 2010
OK, after a dozen pages or so, here's something that everyone should understand, a really easy way to do constrained optimization in excel and get reports with lagrangians. First video, about excel solver and one easy example: ...
- bigvlada replied Jan 21, 2010
hmm, it's like you assume that your opponent (all the other guys in the market) will play flawlessly and you use mixed strategy (determine the best losing outcome for you if you know the other one will execute his best strategy). You used Nash ...
- bigvlada replied Jan 12, 2010
I'm an idiot. This could be calculated easier with the ellipse. The area under the curve is always half the area of the ellipse. image And of course, there is only one point where the profit is at it's peak (or risk at it's bottom). ps. I know ...
- bigvlada replied Dec 30, 2009
Well, here's the first attempt at the first problem. Given the initial balance and risk size, there exists a finite number of lot and stop loss sizes. If we punch balance, risk, preferred stop loss and lot size, we'll get something like attached ...
- bigvlada replied Dec 22, 2009
These two spreadsheets will help you to visualize and calculate area under the curve.
- bigvlada replied Dec 21, 2009
We talked about infinite series. They are convergent if they have a limit. Here's how to calculate the sum of infinite series. We want to calculate all possible distances between a and b and all possible lot sizes between x (starting lot) and 0 ...
- bigvlada replied Dec 16, 2009
hmm, are we looking for something like this, only with two variables? image image url pdf shows the properties of this function and expansion at x=0. I wonder if we are looking for the series expansion at saddle point.
- bigvlada replied Dec 10, 2009
Twoblink, let me see If I got this right: I'm using price as my z-axis, price as a function of stop-loss and lot size. so the coordinates in 3D are (x,y, f(x,y)) and we are looking for f(x,y), the function that gives us optimal price for our stop ...
- bigvlada replied Dec 9, 2009
This Mathematica program could be useful as a starting point in our function finding problem. Many famous sequences occur as the coefficients of a series for an exponential function, which is called the exponential generating function of the ...
- bigvlada replied Dec 3, 2009
Functions of multiple variables can be differentiated with respect to either of their variables, the other variable being understood to be held constant during the differentiation. The partial derivatives are written as ∂f/∂x, ∂f/∂y, and so on. The ...
- bigvlada replied Nov 30, 2009
Khinchin's Constant In number theory, Aleksandr Yakovlevich Khinchin proved that for almost all real numbers x, the infinitely many denominators ai of the continued fraction expansion of x have an astonishing property: their geometric mean is a ...
- bigvlada replied Nov 28, 2009
Definition of graph of function of two variables: Suppose that f is a function of x and y. The graph of f consists of all points in space of the form (x,y,f(x,y)) where (x,y) is in the domain of f. A function f of two variables is a relation that ...
- bigvlada replied Nov 24, 2009
And in the end, second derivative grapher, function grapher and Riemann sum grapher But, start with the first chapter of this on-line course and work your way to derivatives, integrals etc... Then read the thread again and give some fresh ideas ...
- bigvlada replied Nov 24, 2009
here's some more excel sheets about derivatives, slopes, graphs, etc... to visualize our discussion.
- bigvlada replied Nov 24, 2009
The interest is there, but the problem is hard, or should I say: The spirit is willing but the flesh is weak. I've mentioned the resemblance to the Fermat's Last Theorem before, the problem looks easy on the surface, but dig a little deeper and ...
- bigvlada replied Nov 2, 2009
we know that x2=x1+y1 and x>y For real,rational, whole (these are just easier to start with) numbers, lowest value for x is 2 and for y is 1. If we take that y2=(x1+y1)-1, the first ten values for x and y are: x: 2,3,5,9,17,33,65,129,257,513 y: ...
- bigvlada replied Nov 2, 2009
And here is the example, query for e^x+1
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