module Definition and 156 Threads

In this lecture, the lecturer claims that the ##C^{\infty}##-module of smooth vector fields defined on a smooth manifold can lack to admit a basis (not even infinite dimensional). Indeed the set of smooth vector fields can be given an (infinite dimensional) vector space structure over the field...

Hi, I recently acquired some of these cheap modules for plasma experiments. I tried dissolving the epoxy off of one of them in an attempt to reverse engineer the circuit. I can see a resistor, diode, and transformer but am unsure about some of the other components. I was wondering if anyone here...

The current Wikipedia article on Torsion element (https://en.wikipedia.org/wiki/Talk:Torsion_(algebra) ) says: A ring R can be used to define a module M of the ring over itself. Multiplication of a module element m by a ring element r is the same as multiplication in the ring. If m is not...

I will have to teach a first course in differential equations. What should I cover in this module? For example, in most books they have Laplace Transforms which is fine but I would not use LT to solve differential equations. I want to write a course that it motivates students and has an impact...

If ##R## is a commutative ring with ##1## and ##M## is an ##R##-module, the support of ##M## is defined as ##\operatorname{Supp}M = \{\mathfrak{p}\in \operatorname{Spec} R\mid M_\mathfrak{p} \neq 0\}##. Show that if ##\phi : R \to S## is a ring homomorphism and ##M## is a finitely generated...

The following provider module imports a_missing_module and implements a helper_function. (I haven't put in any code that actually uses the missing module, but there could be such code in general). # provider.py import a_missing_module def helper_function(): return 999 Now this client...

Hello! I have some troubles with the definition of the so called super Lie module. In Alice Rogers' textbook "Supermanifolds theory and applications" definition goes as follows Suppose that ##\mathbb{A}## is a super algebra and that #\mathfrak{u}# is a super Lie algebra which is also a super...

Proof: We first show ##W## is a ##\mathbb{C}G## module. Let ##u = 1 + \omega^2a + \omega a^2## and ##v = b + \omega^2ab + \omega a^2b##. It is enough to show ##ua, ub, va, vb \in W##. We have\begin{align} ua &= a + \omega^2a^2 + \omega \\ ub &= b + \omega^2ab + \omega a^2b \\ va &= ba + \omega^2...

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Hello everyone, I am writing Jupyter notebooks which are essentially JSON files. I wrote a custom module called module001 containing some functions and saved it as a .ipynb file. Upon importing the module into a different notebook using the instruction import module001, I received the error...

Hello folks, I want to simulate a 2D heat transfer process in the subsurface on a region which is infinite on the r-direction. So, as you know, the very basic way to model this is to draw a geometry that is very long in the r direction. I have done this, and the results that I obtain is correct...

I watched a movie a while ago (i think it was called Stowaway) where there was a craft with artificial gravity, and enough space for everyone's needs that was continuously going between Mars and Earth gravity assist slingshotting around them each passing. And then the crew just used a small...

I found this in wikipedia It only gives the definition of a Fredholm module. so i would like to find simple examples. what is this hermitian involutive F? thanks

I use a 2 Relay Motor module to control Direction on a motor (linear actuator). When Relay A is active, actuator retracts. When Relay B is active, actuator extents and Led Module is activated. After some repetitions Led module fail. Cause of the fail? I believe Surge voltage, although i am not...

I am looking at a solar panel and would like to be able to plot the IV curve for it. I have Isc, Voc, Imp, and Vmp from the datasheet so I can get the fill factor. I know each cells dimension and the number of cells too so I can find the current density if required. Is there a way to use the...

My Samsung S8 has a weird problem. The wifi is not working. After bringing it to official Samsung Service Center. They tried fixing the firmware and software. But it didn't fix it. They said they couldn't fix the wifi module because it is inside the motherboard so have to replace the entire...

I'm using this user-defined module for an amateur coding project, and I am using 'Text' from the 'inquirer' module. When I am either inputting things, or whenever I am validating things, I always get some sort of error. These errors mainly result whenever I hit the back-space key on my...

I got a gesture sensor module that produces a signal per event. The each signal is a set of regularly sampled readings from four photodiodes. The number of samples per event can be very different, from around 20 up to over 100, and each sample value is essentially the measured brightness...

Hello everyone, can somebody please explain me what is the function of this relay. I can't understand it from their datasheet. Thanks. https://www.ifm.com/ua/en/product/AC2258?tab=details

Hello, I am trying to fully understand the difference between module, library, and package in Python. I think a module is a single file with a specific functionality. A library is like a directory: it contains multiple files, i.e. multiple modules. A package contains multiple libraries and...

I'm starting at Durham on the 29th of September and I need to get my module choices sorted. I have the choice between 40 credits of maths modules designed for scientists, and 40 credits of maths modules done by regular maths students. They say that you should only do the regular maths modules if...

I have no previous experience using this tool. My question is if some of you have any comment about this tool or any option for image processing using similar cards such as arduino, etc.

I want to produce a resource that has a narrative and includes the following topics: Sets, logic and proofs, numbers (irrational, integers, rational, …), binomial theorem, geometric series, inequalities, define things like identity, polynomial, symmetry, sigma and product notation. It is in aid...

Hello everyone, I am wondering how to model ambient air around a thermoelectric module in COMSOL. I am fairly new to the software and am doing undergraduate research revolved around it. Any help or pertinent examples would be appreciated. I can send/post screenshots and or .mph files if it would...

Dear Forum Members, I need to create and use dynamic-link library (DLL) for Fortran application using Compaq Visual Fortran 6.6. The following code works just fine: ########################################### PROGRAM AMAIN1 IMPLICIT NONE REAL(8):: A,B,S A = 1D0 B = 2D0 CALL SUBRO1(A,B,S)...

Hey guys, quick question on this module.The manual states " 5V-3.3 converter onboard for operation from USB" Does this mean that i can power the board straight from my computer without error from "overloading" the board.i ask this because a lot of other modules such as these don't work like...

Given a ring R, how exactly do I interpret it as a module? A lot of my homework assignments involve treating a ring as "a module over itself" and I don't know precisely what that means.

I am reading Paul E. Bland's book, "Rings and Their Modules". I am focused on Section 4.2: Noetherian and Artinian Modules and need some help to fully understand the proof of part of Proposition 4.2.5 ... ... Proposition 4.2.5 reads as follows: https://www.physicsforums.com/attachments/8189My...

I am reading Paul E. Bland's book, "Rings and Their Modules". I am focused on Section 4.2: Noetherian and Artinian Modules and need some help to fully understand the proof of part of Proposition 4.2.5 ... ... Proposition 4.2.5 reads as follows: My questions are as follows:Question 1 In the...

I was wondering about "writing a module to a linux kernel." This question haven't asked yet. Would you please explain why linuxers write such modules to a linux kernel? What is the reason? Thank you.

Here's the problem: I don't see why there should be only finitely many nonzero a_z in b. I was able to prove uniqueness assuming that there only finitely many nonzero. I was able to show b implies d and b implies c, c implies a.

When I see stuff on Netflix (yes not real), and yet I look stuff up on the Net (real) and they try and create a spaceship capable of travellng anywhere else in the solar system, they always come up with standard missile design and go "new and improved.." When they then show failure to actually...

Good morning people. Recently I started programming in assembly language my PIC16F877A. Success. Now I wanted to work with a LCD display (more specifically a 16x2 LM016 display). At first I did not know the commands until I saw a datasheet and this page...

Hi all, I study Mathematics and Theoretical Physics at university. Next year, I'll have a choice between three modules; Thermodynamics and Statistical Physics Cosmology Fluid Mechanics My main interest is Condensed Matter Physics; therefore, thermodynamics and statistical physics is a given...

This is the worksheet my quantitative reasoning teacher assigned us. I was able to complete the chart using Microsoft Excel and printed a page that has all the values for to table in with the table. A tutor at my college gave me the logical formula to find the minimum payment, interest, and...

Hi , I have a 50khz square wave from a smps transformer and currently I am using MUR 1620 fast diodes but since they come in individual trasistor type TO220 type packages I have some problems with attaching them properly to heatsink , does anyone know are there any nice diode bridge modules like...

Hi. I was wondering if you could help me out a bit here. I have a choice to take either a module on stochastic dynamics in statistical mechanics or quantum computing for my masters. Both seem really interesting so it’s a close tie between which one has more current/future applications. The...

In general calculations of gear design, addendum is taken as a factor of the module of the gear such as equal to module or 0.8 times the module and dedendum is taken as 1.25 times the module. Why are both these defined in terms of module? How did we reach to this conclusion?

In a circuit that I'm building, I have a power source of 5 volts DC that powers various components. A few of them are LED lights and light bulbs. -Background Info- In circuit 1, I have a step up buck "2A DC-DC boost step-up Conversion module MicroUSB 2-24V 3V to 5v-28V 12v 9v 24v"...

I am reading T. S. Blyth's book "Module Theory: An Approach to Linear Algebra" ... ... and am currently focussed on Chapter 1: Modules, Vector Spaces and Algebras ... ... I need help with an aspect of Theorem 1.1 part 4 ... Theorem 1.1 in Blyth reads as follows: In the above text, in part 4...

I am reading T. S. Blyth's book "Module Theory: An Approach to Linear Algebra" ... ... and am currently focussed on Chapter 1: Modules, Vector Spaces and Algebras ... ... I need help with an aspect of Theorem 1.1 part 4 ... Theorem 1.1 in Blyth reads as follows:In the above text, in part 4 of...

For a hobby project I got a couple of RF modules, a QAM rx2 433 receiver and a DSQAM tx1 transmitter. I understand they need some kind of TTL to work, would just using some NAND gates hooked up to the transmitter and receiver be enough or do I need something more fancy like encoders and decoders?

Does the efficiency of a PV module and solar thermal collector go down as ambient temperature (outside temperature) increases? I know there are other factors that influence efficiency, but I'm only considering the one parameter of temperature on a PV module and solar thermal collector.

I have a sine wave produced as an output, which varies. This sine wave has been filtered by a moving average filter. From this output, coming out of a DAC module, I need to obtain the the voltage peak-peak value and store it preferably in an array. How can I do this? More importantly how can I...

I have two systems that are approx. 300-400ft apart that I am connecting via a 10 Gig fiber connection. The fiber I am using is a 100um core MM fiber and the switches will be using a 50um core OM4 (4700 MHz*km) SFP module. Is there a way to find out what type of loss I should be expecting, is...

I am a product developer but not an electronics engineer. I am doing a cost analysis of a product idea for my company. The product will need something like this... There will be two small portable devices (A and B) 1 meter apart (not in line of sight since A can be in pocket). Product A will...

Any one know circuit inside DC boost step up pulse generator? I have this one buy from ebay 400Kv type,i want to know how this work by circuit inside.. I had googling and not found result.. Please help me..

I was troubleshooting a solenoid valve,and had wired a device that look like an capacitor.I did a research on the info on it.,and it was a suppressor module.

Dear group, I downloaded this software "cygwin," (terminal), and trying to run Python on this software but i failed on the installing the serial, Could you please give me some ideal? Thank you, Nate Duong.$ python Blinking_off.py Traceback (most recent call last): File "Blinking_off.py"...

Homework Statement Using the PhETLunar Lander applet, we are to find the mass of the lunar lander. We know the maximum acceleration of the module's engines and gravitational acceleration of the moon. Homework Equations F=ma mgh=1/2mv^2 f*t=p The Attempt at a Solution Everytime I try to...