#math - Sun 1 Apr 2007 between 03:19 and 03:35

NY Lost Funds



TRWBWprogek: np
progek: last hint, unless you do something bad, you should turn that into a quadratic
progekso something like ax2+bx+c = # ?
TRWBWprogek: where #=0, yes
bsmntbombdoodwhat is a function that is the sum of sinosoids called?
TRWBWbsmntbombdood: unclear, if they of the same frequence you get another sinusoid
bsmntbombdoodnot neccisarily the same frequenc
y
progeksorry for so much trouble on a simple question. I can solve quadratics once set up but I cannot seem to transform that into a quatratic equation. I know (x+2)(x-2) would cause (x2 - 4) but I don't know how to use the miles.
oh wait
clarity_can all mutually dependent events be shown by one example
progekI might have it
TRWBWprogek: multiply both sides by that, get 5(x^2-4)=12*(x+2)+12*(x-2)
clarity_what i mean is... like with group theory all groups are bijective to a permutation group
t35t0r%2+2
clarity_i'm trying to think of the sample space for this example but i don't know that much about probability
TRWBWclarity_: you can abstract probability as a set with a measure over it, and events as subsets of that set
clarity_what do you mean measure
TRWBWclarity_: a mapping from subsets of the probability space to numbers >=0, i.e. Pr(X).
clarity_: with some properties, lookup "measure"
clarity_: basically the same properties you would want an integral to have
bsmntbombdoodis it possible to convert a function of the form \sum_i a_i \sin (b_i x + c_i) into the form \sum_i a_i \sin (b_i x) ?
TRWBWbsmntbombdood: nope. you can't turn sin(x+pi/2) into a multiple of sin(x)
progekok I got 5x^2 - 20 = 12x + 24 + 12x - 24. After turning it into a quadratic equation I got-> 5x^2-24x-20=0 do I have that right?
clarity_hrm, so that's the same as listing all the elements in the set and saying "they all have equal probability" and assigning each one the probability 1/n
right?
TRWBWbsmntbombdood: you can however turn it into a sum of a_i*sin(b_i x)+c_i*cos(b_i *x)
clarity_that would be the measure function?
TRWBWclarity_: yes, but it handles things like infinite sample spaces, like picking a random point in a square
clarity_ah, i'm not that advanced yet
TRWBWclarity_: the measure function would be the sum over the set of the probability of individual elements
clarity_: in the infinite case, some kind of interval
clarity_so is there a relation between mutual independence and the measure function?
perhaps that's where i'm getting confused
TRWBWclarity_: well independence is then defined as Pr(A intersect B)=Pr(A)*Pr(B)
clarity_i understand the dependence means that one event depends on the other one
hrm
TRWBWclarity_: in the formulation i'm talking about, that's the *definition* of independence, simply that the formula works
progek: not sure, i think let me do it. 5(x^2-4)=12*((x+2)+(x-2))=12*2x=24x
progek: so 5*x^2-24x-20=0

Page: 3 10 17 24 31 38 45 52 

IrcArchive

NY Lost Funds