Writing Definition and 688 Threads

What is your favorite writing tool and why? Do you prefer pen or pencil for doing math/physics and why? What about for normal writing? For awhile I've been using a Rotring 600 silver drafting pencil that was passed down to me, but I'm still not sure whether I prefer pencil or pen. I have...

Homework Statement Given the following defined transformation T(a + bt+ct^{2}) = (a+c) - (c+b)t + (a+b+c)t^{2} find the matrix with respect to the standard basis From my understanding, the standard basis for a 3 element vector would be (0,0,1)^{T} (0,1,0)^{T}...

Many journals encourage authors to use their special latex packages (e.g., revtex4-1 for physical review a,b etc) while sending an article for peer-review process. I am not sure if this is compulsory or optional. Will an article be rejected if it is written not using the special latex packages...

Hello, In the notation adopted by Peskin and Schroeder, the single particle state is \left|\boldsymbol{p}_1, s_1\right\rangle = \sqrt{2 E_{p}} {a_{p_1}^{s_1}}^{\dagger}\left|0\right\rangle How does one write down \left\langle r|\boldsymbol{p}_1, s_1\right\rangle = \sqrt{2 E_{p}} \left\langle...

Homework Statement given: Vn+1=Vn*cos(pi/2^(n+2)) Homework Equations Write a sequence Vn in terms of n The Attempt at a Solution we substitute n with n-1 and we get: V(n-1)+1= Vn-1*cos(pi/2^(n-1+2)) Vn=Vn-1*cos(pi/2^(n+1) Is this correct?

I am new to quantum physics. My question is how to write the Hamiltonian in dirac notation for 3 different states say a , b , c having same energy. I started with Eigenvaluee problem H|Psi> = E|psi> H = ? for state a? SO it means that indvdually H= E (|a><a|) for state a and for all three...

I want to learn how to write professional looking letters so I have to learn how to use punctuation and stuff properly. As silly as it seems, I still don't know when and where to use commas. I used to not know how to use them at all but someone advised me to sound out the sentence in my head and...

I hate having to sign my name! Why? I don't have the ability to consistently sign something in a nearly identical way. Right now I'm signing the publication copy of my thesis and I've printed up 6 copies of the page that I need to sign my name on just because I know I'm not going to be satisfied...

I am comparing LP's and SDP's and have come across a lot of papers where they show all of the differences, but I am trying to put an lp is sdp form. The reason being I have solved an advanced sdp using an online solver and can solve basic/advanced lps on my pc, but I now want to take a lp and...

Did anyone write a program before for Newton Raphson method on MATLAB. I need to try the program to solve 2 equations: cox=x^3 and x^4-0.5(x^3)+3(x^2)-x+3=0 Please Help me in this manner ASAP. AND THANK YOU

I have four essays to write for my internship each of a maximum of 350-400 words. I just wrote my first essay and I feel relatively content with it. Though I can't help but doubt my work.. I wrote it rather unconventionally you can say. Instead of being very formal, I used more of a...

I suppose this has to go under homework, so here it goes: I'm in Calc III and we won't have enough time to cover the last chapter in the textbook about Stokes theorem, Green's theorem, and the divergence theorem, so instead the teacher wants a 7-page paper on something from that chapter. She...

Homework Statement A region R is given. (ill just tell you that it is a triangle, given by lines x = -2, y = 2, and y = x). Decide whether to use polar coordinates or rectangular coordinates and write \int\int f(x,y)dA as an iterated intergal, where f is an arbitrary continuous function...

Homework Statement I'm having some issues coming up with a proof for |- (Box(P) ^ Box(Q)) -> Box(P ^ Q). Box is the unary operator for "necessary for". Homework Equations Axiom 1 A -> (B -> A) Axiom 2 (A -> (B -> C)) -> ((A->B) -> (A -> C)) Axiom 3 (~a -> B) -> ((~A -> ~B) -> A)...

Hello, I understand that this question may seem rather obvious for some. Nonetheless, it is something that seems to have thrown me off a number of times. When writing chemical equations involving acidic or basic solutions, I know that the acid on the reactant side is written with the state...

Folks, I find it very tedious writing using latex symbols on this forum, i.e. I continually have to click ‘preview’ to see that the equations turn out ok before submitting. Is there some compiler I can use that generates the math independently of this forum then I could copy and paste onto...

I don't know how often you get questions like this here, if ever, but I was hoping you could help me solve a problem I have come across in writing a story. It is not exactly Hard Sci Fi, but it is definitely not soft science fiction, and I want to get the physics at least mostly right. Here it...

Please Help! I'm writing a novel involving worm holes and asteroids/meteors I thought it would be best to ask the experts in the field to make sure I don't get lynched when this book comes out. Please help however you can. The date during this particular incident is Feb 14, 2016, 11:47 pm...

the general form of state space output is y=cx+du which means that output is linear combination of state variables and inputs my question is can we write output in this form when our output is not combination of state variable for example in rlc circuit state variables are vc and IL now if we...

I am working in FORTRAN I need to avoid writing to the same file at the same time while working in a parallel environment. I have a program (that I have not written and cannot edit) that calls a subroutine (that I have written and can edit). The subroutine is called over and over again by...

Hi, I was reading a paper on control of the 1-D heat equation with boundary control, the equation being \frac{\partial u(x,t)}{\partial x}= \frac{\partial^2 u(x,t)}{\partial x^2} with boundary conditions: u(0,t)=0 and u_x(1,t)=w(t), where w(t) is the control input. The authors...

Need help writing C++ program that counts non-whitespace characters...? Homework Statement Here are instructions... Write a program - stored in the file charcounter.cpp - that will read and count non-whitespace characters from the standard input stream - until some special character is...

Homework Statement Homework Equations How did they come up with \frac{1}{2}+k for the equation of the vertical asymptote? I understand everything else except this.The Attempt at a Solution On this particular exercise, I graphed it and saw that each of my vertical dashed lines were all one whole...

I just submitted a lab report for a TLC experiment, but I just realized that I completely forgot to include the "reactions" section. It's too late to save that grade, but for future reference, how would one go about writing out a chemical equation for a TLC experiment? I had always understood...

I have a lab report due a week from now. I want to go above and beyond of what is required of my class and to make it as professional as possible. This is to help me prepare for my future lab reports. I will be using word processor for equations and tables to the best of my ability. Would it...

1. Let m, n, p, q \in Z If 0 < m < n and 0< p \leq q, then mp < nq 2. Propositions/axioms I can use that relate to inequalities 2.4 Let m,n,p \in Z. If m < n and n < p, then m < p 2.5 For each n \in N there exists an m \in N such that m > n 2.6 Let m,n \in Z. If m \leq n \leq m then...

Homework Statement For each positive int k, there are k consecutive pos ints that aren't perfect-squares. I'm trying to write this in symbolic logic, but am getting messed in the second part and might be a little off on the first. Homework Equations The Attempt at a Solution...

I been trying to look into e-mail etiquette in Japanese culture. I do not speak Japanese actually. The person I was refereed to did reply in English. I was wondering if last name-san is sufficient or do I need something else. I am trying to purchase a metal that they only forge for my...

My professor highly recommended to us that we take a technical writing course because apparently it looks really good on the resumes. What is your opinion on this? This applies for any Electrical/Electronics Engineers/Technicians.

To what extent do skilled mathematicians/physicists write things out as they think? Could it be much less than one might initially suspect? Suppose, for example, somebody argued that writing things down ought to be avoided when one is solving problems. The argument would be that writing is...

How do you write error messages for when a function has been given an input that is illogical for what the function does. in matlab function b = bla(a) for example if a < 0 i want it to display a message

This is something I have been thinking about and researching. I have found some answers, and it seems to be different depending on the requirements of the university, etc. Still I wonder when is it that undergrad students start writing their thesis? If you have written a thesis, what...

Has anyone ever had the opportunity to have a theoretical quantum computer running on your PC (being simulated) and write software for it? If you have, could you tell me what you used for the quantum computer and maybe some "Hello World" code (a book explaining the 'language' and some of the...

Hello, What would be the best way to write Engineering Research Papers at an Bachelor Level. I mean how to go about choosing the topic? And doing actual research about it? I mean I know it all depends on the interest of a person,but choosing a topic or a technology to write upon is a...

Homework Statement After extensive investigation, a researcher has found that the mean travel time for mice through one particular maze is 29.0 seconds. She believes that the mice will move faster through the maze when subjected to a loud noise. In order to assess this, the researcher has...

Hello, I am currently writing a paper for submission to the PRL. I wish to put in a note after the names of the first two authors, stating "These authors have contributed equally to this work". I would like to solicit the help of the Physics Forums community in knowing how to do this. In some...

This is something that has had me stumped for quite a while. I'm working with a microchip microcontroller to control this LCD: http://www.varitronix.com/Product/LCD/VIM-332-DP(R0).pdf As you can see it has no controller. I'm manually controlling the segments. Now the issue is that I need to...

I want to write a research paper on general relativity or mathematical physics. I am a college freshman (will become sophomore after this summer) belonging to an engineering major. In this summer break, I have managed to learn about tensors. Currently, I am following the Respected Professor...

Writing Sci-fiction Graphic Novel need advisement in "space travel" I've used VASIMR rockets as a reference and cited them as precursors to what now allows "rapid stellar travel" at say Earth to Mars in forty eight hours. Any advice on how this could be at least theoretically possible?

http://tribstar.com/news/x1435410216/Archaic-Method-Cursive-writing-no-longer-has-to-be-taught (Terre Haute Tribune-Star) I type faster and more neatly than I can write, so the only things I write now are my signature, shopping lists and other short lists, notes on freehand diagrams, and...

I'm writing some of my proofs up in french in order to practice the language and I have a few questions for any of you french speakers out there. First, what voice is generally used 'nous' or 'on'. Second when I am telling the reader to perform this or that mathematical procedure, do I use...

Fortran95 HELP! Hi everyone, I have problem with writing a procedure in Fortran. I'm a newbie so any help will be appreciated. So the problem is as follow: I have written a program which reads some data from input file and then calculates some stuff using read values. Now what i have to do...

Don't get confused by the title: Simple and short: My sister for some reason can't write properly (alignment, neatness), if she doesn't turn her book horizontally. I've been forcing her to practice working with the book vertically but she's struggling and the writing is coming out sloppy...

I'd like to first say that I'm not really sure which forum this is supposed to belong in. This one seems to fit best, but my question may be better in one of the math/physics forums... I'm planning on going through the resources Chris Hecker recommends in his article Physics References...

actually i want two write a review article on issues related to civil engineering such as earthquake resistance,concrete(semi transparency) etc and i want to get it published. i have thought about a number of topics which were not so interesting .please suggest me with some good interesting...

Good day, I have been given the task to create an inventory database for the books at the library at my school using the RFID to monitor the books. However the books have specific codes based on their type and location in the library. I was wondering if someone could give me some information as...

About the Analytical Physics constraint writing... I have added a photo about my problem. My problem is why did we write while calculating constraint values as d/2. you will see on the picture what I am saying, I cannot see the reason of writing d/2

hey guys, so I am new to linear algebra and is just learning matrix algebra let A = a_ij be a 2 x 3 matrix, defined by a_ij = 2i + j. Write out A would it just be |1 2 3| |4 5 6|

Hi, is possible to set up somehow cursor on end file.txt position for write function ? I can use only read,close, open functions from /fcntl.h/, + anybody know how convert number system from one to another and to write result into the file in correct way... e.g. I need covert [123456]Z7...

I want to use MikTex to do my physics laboratory informs. The thing is I have to write the informs in spanish, and I've found that I can't use the tilde on my work, which is really bad, because I can't write it orthographically as it must be done e.g. I can't write Dinámica, but I can write...