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# General Math

- Math topics not applicable to the categories below. High-school Math
 Views: 8,614 Announcement: Two free ways to get Gold Membership! Jan17-12 Meta Thread / Thread Starter Last Post Replies Views Please post any and all homework or other textbook-style problems in one of the Homework & Coursework Questions... Feb23-13 09:23 AM micromass 1 32,520 I have an equation for determining the acceleration of an object being propelled by a constant power source, that is... T 01:33 AM Pharrahnox 0 32 I have a model (autoregressive model) described as follows: Y(n)=Y(n-1)*c This model in math, is it considered... Y 10:58 PM Stephen Tashi 2 66 Is there a function that equals 1 at x=0 and equals 0 when x isn't 0 without using a piecewise function? I've been... Y 10:29 PM DrewD 3 79 Is there a simple way to make a function go through a set of points? Something similar to what I'm looking for is... Y 09:44 PM micromass 1 58 Moved: Addition of sine waves - - - I was thinking... if the modulus of a vector can be calculated by ##\sqrt{\vec{v} \cdot \vec{v}}##, thus the modulus... Y 06:10 PM DrewD 1 102 If I have a relation which is not only antisymmetric (##aRb\rightarrow{}\neg{}bRa##) but it also has a property that... Y 02:40 PM V0ODO0CH1LD 2 114 The record for the number of decimal places of accuracy for the Euler-Mascheroni constant stands at just over... Mar9-14 09:46 PM lurflurf 4 239 Just covered branch cuts in my undergraduate course but stuck on one of the questions... Find the domain on which... Mar9-14 10:41 AM FelixHelix 4 227 Hello everyone, I'm working on a problem and it turns out that this equation crops up: 1 = cos^{2}(b) where ... Mar8-14 11:44 AM Legaldose 3 193 Has anyone else tried to prove that 1 + 1 = 2 besides Russell? Mar7-14 05:22 PM Mark44 10 386 Can a function have two periods? If so, which is the fundamental period? Consider the following function, $$f :... Mar7-14 11:32 AM jbriggs444 13 244 Im trying to find a general formula I can store in my calculator that can find the number of onto (surjective)... Mar7-14 02:29 AM DerekZ10 2 169 This has kept me up pacing the Floors many nights now, but what is 0/0? It's either, 0/0 = 1, because anything... Mar7-14 12:17 AM Mark44 2 207 Wiki defines a real number as But then it turns out that that definition is not rigorous: Since we don't... Mar6-14 11:10 PM Blackhawk4560 10 330 I've been thinking about some common properties of mathematical objects and I've been wondering if they are redundant.... Mar6-14 05:54 PM Fredrik 17 338 Hey Guys, This is my first post to Physics Forums. If I posted this question in the wrong area or am violating... Mar6-14 08:08 AM Cornell2017 7 239 The title pretty much says it all, does anyone know of an infinite series summation that is equal to$$\sqrt{-1}? Mar5-14 10:37 PM DrewD 41 1,112 4D space? ( 1 2) Hey guys here is my question. 1D = Line 2D is a plane. 3D is space. So shouldn't a fourth dimension be something... Mar5-14 07:43 PM L.Newton 21 437 Are there any "famous"(i.e. crucial) unsolved mathematical problems in the field of machine learning or the general... Mar5-14 05:52 PM .Scott 1 163 I am trying very desperately to figure out this specific problem I don't need examples of other problems i need this... Mar5-14 04:16 PM jacobtwmurphy 3 599 I'm trying to write a contracted general equation for an expandable equation. Just like there's the summation symbol... Mar5-14 10:40 AM iScience 2 161 Hi, I am wondering why the order of operations where made? Is it the case that mathematics is just a tool of... Mar5-14 06:54 AM arildno 18 482 Why do I run into trouble if I try to define the set of all groups? I get that defining the set of all sets could lead... Mar4-14 11:18 PM V0ODO0CH1LD 4 287 Any boolean function on n variables can be thought of as a function f : \mathbb{Z}_2^n \rightarrow \mathbb{Z}_2 ... Mar4-14 09:05 PM Dragonfall 0 164 Hello So I'll be going back to school for math next semester, so I might not know the answer to this because I... Mar4-14 05:30 PM CuriousBanker 20 352 Why are some quantities vectors while others aren't? For example, we can calculate both current and current density,... Mar4-14 03:35 PM jaytech 1 173 When dealing with the intermediate value of example: 570 +/- 100, how do you put this into it's final form? If I'm not... Mar4-14 02:27 PM MathewsMD 8 269 In the picture attached I have tried to list the different shapes you can get when you attach, 1, 2, 3, 4 squares,... Mar4-14 08:54 AM aaaa202 2 144 We all know that 12/25 + 18/30 is not 30/55 yet students are happily told that they got 12 out of 25 in their... Mar4-14 05:33 AM llstanfield 3 250 Hello, I am looking for some direction to books or papers which may help me, When you solve the Helmholtz... Mar4-14 04:58 AM Gwinterz 5 417 I remember learning this in high school, but I can't track down a proof. Let ABC be a triangle and DE a line segment... Mar3-14 06:10 PM stlukits 11 220 Hi,I have found out,that I have problem to understand basic algebra.Especially dividing with units.I do not... Mar3-14 10:35 AM Stephen Tashi 15 917 I thought I'd just quickly tell you guys why I want to graph this equation before giving it you. We're studying... Mar3-14 01:26 AM karpmage 1 223 Why is the parallelogram rule for the addition of forces as it is? I feel it must have some deep origin and pointing... Mar2-14 09:29 PM UltrafastPED 9 325 Sorry for any mispellings, English is not my first language. So, I'm studying irrational numbers and I got curious... Mar2-14 10:44 AM MonkeyKid 25 688 Is anyone able to provide a resource for the proper formulae to use in determining blade dimensions for an aperture... Mar2-14 10:28 AM Stephen Tashi 1 242 I was reading the Wikipedia article about the sum 1+2+3+4+..., and I saw this explanation: c = 1+2+3+4+5+6+... 4c =... Mar1-14 11:15 PM micromass 3 264 I am a bit confused often when I have to compute cross products in other coordinate systems (non-Cartesian), I can't... Mar1-14 07:40 PM Chestermiller 4 251 I have a hard time believing we only have the limited number of series I have seen so far especially considering how... Mar1-14 05:29 PM mesa 16 338