List Definition and 507 Threads

  1. tom.stoer

    List of matrix elements or Feynman diagrams

    Is there a list of matrix elements for elementary processes? ##f\bar{f}\to\gamma\to f^\prime\bar{f}^\prime## ##f\bar{f}\to Z^0\to f^\prime\bar{f}^\prime## ##ff^\prime\to W \to \ldots## ##qq^\prime\to \ldots## ##\ldots##
  2. J

    MHB Maximum number of comparisons required for a list of 6 numbers

    The question asks me as follows: "What is the maximum number of comparisons required for a list of 6 numbers? Is the correct answer as follows: The maximum number of comparisons required for a list of 6 numbers is 5 comparisons. If this is not right, then can somebody please help and explain...
  3. J

    MHB When Bubble Sort to sort a list of numbers 7, 12, 5, 22, 13, 32

    Can somebody tell me which example is right when a question that is given to me says to bubble sort a list of numbers 7, 12, 5, 22, 13, 32? I found two examples and one was with a graph that included Original List, Pass 1, Pass 2, Pass 3, Pass 4, Pass, 5, and Pass 6, the numbers with 7 on one...
  4. A

    Best Puzzle, Logic & Brain Teaser Books - What's Your Favorite?

    list the books you know..! List all puzzle, logic and brain teaser books you know with the little bit of information AND also what subjects is ur fav? let us know ..
  5. O

    Does an explicit list of 20 independent compenents of Riemman exist?

    Hello all, I have been given a problem where I am asked to calculate "all" the components of the Riemann tensor in a gross non-diagonalized metric. I know there exists at most 20 independent components of Riemann, but I want to actually compose a list of these combinations. It is easy...
  6. karush

    MHB -aug.16.data list from table intervals

    in creating a list of numbers to find mean, median, mode, range and some other questions with this table height in meters| frequency 8 \le h < 10\ \ \ \ \ \ \ \ \ \ 6 10 \le h < 12\ \ \ \ \ \ \ \ 5 12 \le h < 14\ \ \ \ \ \ \ \ 7 14 \le h < 16\ \ \ \ \ \ \ \ 4...
  7. M

    MATLAB Matlab fails to access a list of variables

    So I have a list of variables, defined in my workspace, and I'm trying to access them each in turn to compare them to a larger matrix A. The eval function calls each variable in turn, stores it under temporary matrix B, then compares it to matrix A, does the necessary calculation, and stores it...
  8. B

    How to Back up List of Favorites

    Hi, All: I have a Windows 7 Pentium system with IE--pretty close to the latest update. My list of favorite Internet sites is pretty large; easily more than 60 items. Sadly, my system has crashed a few times over the last 2-3 years, and I have lost the list each time when reinstalling...
  9. liometopum

    What Is the Best Source for a Comprehensive List of Particle Half-Lives?

    Does anyone know of a site that lists particle half life times, all in one place?
  10. H

    Notation for Lists in Math: Symbol, LaTeX

    Greetings, Is there a commonly accepted notation for a list in mathematics, of an identical form to Ʃ for a summation? If so, what is the name of the symbol (that would be used in place of L, below), and how would it be typed in LaTeX? For instance, it might look something like...
  11. F

    Unsolved Mysteries in Science: Exploring the Unknown

    Hi all, I'm trying to put together a fairly comprehensive list of mysteries that science cannot currently explain with the standard theory. So far I've got: dark energy dark matter shrunken proton radius from muonic hydrogen As you can see I've only got three items on the list and...
  12. K

    Trying to create a list of Gen4 Reactors & Status,

    This comes from the reactors listed here: http://en.wikipedia.org/wiki/Generation_IV_reactor If more are presented in this format I will edit this post and allow mods to edit this post. I think it is interesting to follow the current progress of fission and hopefully I can get help in creating...
  13. jegues

    Program for printing a list of PDF files

    I am trying to figure out if it would be possible to develop simple program to preform the following task: If I have a list of drawing numbers contained within excel an file as such, 1-02632-M-07502 0002/03 1-02632-M-07502 0003/02 1-02632-M-07502 0004/08 1-02632-M-07502 0005/02...
  14. A

    All Physics Books: Difficulty & Theory/Concepts

    List all physics books you know with the level of difficult PROBLEMS AND also where it stands when it comes to THEORY AND CONCEPTS. LEVEL OF DIFFICULTY ! 1.too easy 2.easy 3.average 4.above average 4.hard 5.very difficult 6.extreme 7.insane! 8.are you nuts!
  15. T

    Recommended reading list for secondary school student

    Hey, I'm new here and didn't know where to post this thread but I decided to post it in the homework and coursework questions part although this isn't about homework. My question is, what are some good books about physics that are on a secondary school (UK) level which I can read that is fun and...
  16. marcus

    Kudo list of well-written exchanges for the month of April :-D

    I've never done this before. Hope the parties involved are not embarrassed by being pointed out. I feel strongly about clarity of thought and writing in Astrophysics and Cosmology. Every once and a while I see a brief exchange that is exceptionally well written from both sides. Someone asks a...
  17. P

    Understanding List of Methids and its Usage in User-32 DLL

    Understading List of Methids and its Usage in User-32 DLL I would want to understand the list of functions, its Parameters and its usage in User-32 DLL. Could anyone let me know the online source for it. Thank You.
  18. T

    Let's make a list of jobs for physics degrees

    I think it might be a good idea to create a list of various jobs that have an open door for someone with a physics degree, BS, MS, or PhD. I would like to add slightly unrelated fields as well, since job hunting can be a nightmare. I would start this list off, but honestly, I have no idea what...
  19. B

    Program to Pick Out Files From List

    Hi Everyone! This is my first question for programming. I have very little experience, so if you could explain as simply as possible. I have a list of output that actually looks like this: # Query: 2678.m000169 conserved hypothetical protein # Database: EST_matched_Genome.fas.txt...
  20. S

    Mathematica Mathematica: Make a 3D List from two 1D lists and a tables

    I am dealing with a set of data where I have values C(x,t) for a discrete set of x and t values. Say: x={1,5} t={1,3,7} C={{C(1,1),C(1,3),C(1,7)},{C(5,1),C(5,3),C(5,7)}}. How do I combine this to a list that looks like...
  21. J

    D.E: Is there a summarized list of all of the D.E. methods?

    On our first test there were about 4 different methods. This test there are about 4-5. There are 4 tests in the class. I'd like to get ahead. The pattern seems to be that you first identify the method that needs to be used, then simply preform the method steps. It is that strange of a thing to...
  22. B

    Need a shopping list for building up a desktop for economic modeling

    Hi everyone, I am thinking of building up a new system to satisfy my need in scientific computing. My program usually involves with for-loop iterations written in Intel Visual Fortran 2013 on Microsoft Visual Studio 2010. Some of my work need to perform numerical methods, like Amoeba...
  23. Z

    Sparse Matrix using linked list of a linked list

    Homework Statement The idea is to create following type of structure: first_row_with_a_nonzero_cell->next_row_with_a_nonzerocell->...->NULL rowN_with_a_nonzerocell->firstnonzerocolinrowN->nextnonzerocolinrowN...->NULL Input file is a 20x50 sparse matrix. The only problem I have is...
  24. B

    List the things f has to do to be a homomorphism

    The function ##f(x) = \frac{x}{x+1} ## is not a Homomorphism because f(1) ≠ 1..Am I correct?
  25. B

    Comp Sci Understanding C++ Linked List Code: Node Structure and Pointers Explained

    Homework Statement Hello, just having a bit of trouble understanding this bit of code: typedef int Item; struct Node { Item data; Node* next; }; typedef Node* NodePtr NodePtr hdlist = NULL; Homework Equations None. The Attempt at a Solution I understand that...
  26. J

    Need a complete list of functions and thier inverses

    I can't find this anywhere on google. I'm looking for a complete list of functions and their inverses. Here's a partial list as an example *, / +, - e^x, ln(x) sin(), sin^-1() d/dx, ∫ etc.. Why isn't there a list of all of them? You would think that some mathematician would find joy in...
  27. micromass

    What Topics Does Hassani Cover in His Favorite Mathematical Book?

    Abstract Algebra Aluffi - Algebra: Chapter 0 Artin - Algebra Dummit, Foote - Abstract Algebra https://www.physicsforums.com/showthread.php?t=704700 https://www.physicsforums.com/showthread.php?t=704865 https://www.physicsforums.com/showthread.php?t=672385 Herstein - Topics in Algebra...
  28. Fantini

    MHB Website with a list of Forgotten Books

    Hello everybody, I've come across this website that contains a lot of old books scanned and for real low prices. They even have a policy of 5 free books per computer, so you can download some before considering buying any. Cheers! (Yes)
  29. R

    I want to see University's textbook list

    Is there a way to see syllabus and textbooks of a university which I'm not belong to? I visit website like course catalog of universities like MIT, Stanford, UC of Berkeley. Some course of some major of some university reveal their textbook used in course but it seems generally that syllabus...
  30. B

    Comprehensive list of inference rules used in physics

    I'm looking for a list of inference rules used in physics derivations. I think this would be distinct from Wikipedia's list of inference rules. As an example of what I'm referring to, suppose two steps in a derivation are T=1/f Multiply both sides by a value, where the value here is f. T f...
  31. Ascendant78

    What Are Affordable Gift Ideas for a Physics Enthusiast?

    I am a freshman in physics at this point, and looking to get some ideas of some things that I might want to add to my Christmas wish list involving my profession? Although this probably won't make much of a difference, I am a 34 year old adult changing professions to one I have always loved...
  32. N

    List file creation date in bash

    How do you list creation date of a file in linux bash? I want to find creation date of some files, not just modification date. Thanks.
  33. E

    LaTeX Latex question about list of notations

    Hello all, I am trying to do the list of notations using tabular environment. However, any letter after filling the first page does not appear, i.e.: only the first page of the list of notations appears. why? Thanks
  34. I

    Mathematica Mathematica 8.0 - Generating List of Powers of Matrices/Graphs

    Hello. I'm trying to consider a matrix A and looking at Ak and (Ak)TAk, where T is the usual transpose. This is no big deal. But I'd rather not look at them one at a time--I want to consider some powers k from 1 through as high as I want them. When I try Table[MatrixPower[A...
  35. bcrowell

    List of common misconceptions about relativity?

    I'm wrapping up 3 weeks on relativity in my freshman calc-based physics course at the community college where I teach. At my final meeting, I want to spend most of the time having the students break up into their lab groups and discuss certain specific misconceptions, questions, and confusions...
  36. B

    Where can I find a list of electrical symbols for different sensors?

    Hi all, I have been looking the electrical symbols for a proximity sensor and a level sensor. A simple google search has not helped and I have also looked at various manufacturers websites, but still no joy. I was hoping somebody could point me in the right direction to a comprehensive list of...
  37. G

    List of Special Relativity Paradoxes.

    Here's a catalogue of paradoxes in Special Relativity, for convenience sake. If I've missed out any, do notify me. Ladder Paradox: A ladder enters a barn. In the barn's frame the ladder is length contracted and fits nicely, but in the ladder's frame the barn is length contracted and it...
  38. K

    Mathematica List of system of differiential equations in mathematica

    Hello, I have a system of DE involving two variables depending on the parameter t. To solve it I need to specify x(0),y(0),x'(0),y'(0). I know how to solve it with NDSolve, (analytical solution doesn't work), and I want to make a list of different solutions with different initial conditions. I...
  39. L

    List of all 2d motion and projectile equations?

    where can I find them? all forms to find out any missing quantity?
  40. F

    Is the list of particles complete and unique?

    I'm wondering if the list of particles in the SM is both complete and unique? Or could we find other particles and interactions that could also be included in the SM? Phyisicists sometimes invent fields and particles to account for Dark matter and inflation, etc. But that introduces particles...
  41. E

    List of all the cross and dot products in physics?

    the calculation of many quantities involve cross and dot products in their formulae. For cross products, i only know of three: lorentz force, angular momenta and torque. For dot products, i only know of one: work done im hoping to add more to my list. Can you guys help me include other...
  42. Ryan_m_b

    Determining Winning Combinations of Parties with >50% Votes

    This is born out of musings around coalition governments that arise from the party with the most votes not achieving ≥50% of the votes (as opposed to emergency coalitions). Taking the figures below how would one go about determining all the possible combinations of parties who combined have...
  43. G

    Does anyone have a list of at what level gems vibrate at?

    Does anyone have a list of at what level gems vibrate at?
  44. G

    List of Properties of Elements: A Comprehensive Guide

    I'm really interested in properties of the elements because it is an important philosophical question. A little while ago when I went through my chemistry textbook I wrote down all the properties I encountered. I was wondering if someone would be kind enough to point out some of the properties...
  45. srfriggen

    Abstract Algebra: List elements of Subgroup

    Homework Statement List the elements of the subgroups <3> and <7> in U(20). Homework Equations The Attempt at a Solution U(20)= {1, 3, 7, 9, 11, 13, 17, 19} = <3> = <7>. So basically I have that the common elements of, <3> and <7> and U(20), under + modulo 20, are all...
  46. M

    Complete list of mathematical notations

    hello! is there a complete list of mathematical notations? thanks!
  47. PhizKid

    Schools List of schools based on undergraduate research?

    My school doesn't have any faculty involved in Condensed Matter Experimentation, and that's what I want to get my PhD in, so I'd like to transfer to a school that offers plenty of research opportunity in this field, instead of just having 1 summer of research experience at an external lab (I...
  48. jcw99

    Trying to find a previously posted list of proofing theorems and postulates

    I've spent a good part of the day looking for a post by one of the members which appeared 3 or 4 years ago and which was linked to every so often by other members. The list had about 10 items in it, one of which was the triangle inequality theorem. IIRC the poster said that he/ she referred...
  49. E

    List of Astronomical Associations / Astrologist in USA

    Hello i got a list already (Which cost me a good amount of money!) But after buying it i analyzed and get that its only based on Texas. I need a list which will cover whole USA. I know people have thee list and they are patented. I want to buy the list from the people who are using them. So...
  50. turbo

    You can be on a do not call list, but that doesn't stop some intrusions.

    Today, two white-haired gentlemen stopped by, knocking on my front door. I knew who they were, and didn't answer. I have repeatedly asked for the last 30+ years or so that the Jehovah's Witnesses please leave us alone. It seems pointless, because they keep coming around. I gladly respect...
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