Math

Help needed
Hi, not sure I'm in the right thread and apologize if I'm not. We just formed a robust free online study community where users can discuss, post questions/answers, form study and tutor groups as well as upload content relevant to any and all textbooks, including math. Its free to sign up and use. We are lookin... 24 Jun 2010 15:15

looking for 1/8 circumference of Earth-Sphere = 5,000 km ; Chapt 19 #197; ATOM TOTALITY
Archimedes Plutonium wrote: Wikipedia provides an excellent picture of a pseudosphere: http://en.wikipedia.org/wiki/Pseudosphere And one can immediately see the two poles cutaway. And if that pseudosphere were tucked inside the sphere the poles of the sphere would be two points but the... 24 Jun 2010 15:15

Incompleteness thru Venn Diagrams
Consider the Venn Diagram that consists of an overall universal set of all sets of sentences, and two overlapping sets within it. One inner set is the set of r.e. sets, and the other is the set of all co-r.e. sets (i.e. its complement is r.e.) Now place these four sets within the Venn Diagram: PR=provable sentenc... 24 Jun 2010 13:02

Deriving the complete set of “non-redundant” true statements in disjunctive form in propositional logic
Given a set of statements known to be true, I need to deriver all the "non-redundant" statements in disjunctive form using only literals that can be derived from this set of statements, i e all statements on the form (a ∨ b ∨ c ∨ ...) where a, b ... are literals. By non- redundant I mean that I do not wish to... 25 Jun 2010 06:38

Potato head's Oily Obama worries
------- ahahaha... AHAHAHA... ahahaha... -------- Brian "spudnik", son of PotatoheaD, "PhD" for short, not Brian but his fatha being that. The son however is still just "thus&so" aka <Space998(a)hotmail.com> who addressed a poster unknown, & "thus&so" he wrote: yeah; that was quite self-referential, dood. ... 24 Jun 2010 05:17

random process similar to random walk
Suppose we have 500,000 red chips and 500,000 green chips of the same size. They are put in a pouch. We mark a y=0 when t=0 on graph paper. At time t = 1, we choose a chip at random from the pouch. If it's green, it counts for +1. If it's red, it counts for -1. y at t=1, or y(1) = +1 if the chip is green, a... 29 Jun 2010 19:37

Constrained solutions of a particular equation
Hello...My today's question is as follows. Consider the 4 variable equation v + x + y - z = 4. If I desire to find solutions to it, I can easily do it by assigning arbitary values to x, y and z and solving for v. But what I wish for, is to find solutions where the variables all belong to the set {1,2,3}. How to do that... 27 Jun 2010 04:10

pseudosphere poles = 5,000 km? in deriving speed of light from purely math considerations ; Chapt 19 #196; ATOM TOTALITY
Archimedes Plutonium wrote: Archimedes Plutonium wrote: Archimedes Plutonium wrote: (all else snipped) --- derivation of speed of light out of pure math ---  Earlier I wrote how the speed of light in physics should be derived  out of pure math  as that of Stripe Ge... 24 Jun 2010 02:04

Inequality with integrals
Hello. Please help with a problem. What is the widest class of functions f(x) for which Integral_0^x exp(a*z) * |f(z)| * dz < const * exp(a*x) for all x>0 ? Here a is a positive number. Thank you very much in advance! ... 24 Jun 2010 02:04

A minor mistake
I no longer have the source file for this preprint. Hence, let me point out here a minor mistake, which appears in pp. 7; "M > 1" should be put beneath the second summation symbol on the right side of (21), so that we do not calculate "n = 1"-term twice in the right. This correction adds, to successive ... 24 Jun 2010 00:59