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• Today, 06:14
Can you give us any idea where the series comes from? Technically the next term in the series could be argued to be anything. -Dan
8 replies | 105 view(s)
• Today, 01:48
Thanks GJA ... Appreciate your help... Peter
2 replies | 32 view(s)
• Yesterday, 23:24
I am reading Paul E. Bland's book "Rings and Their Modules" ... Currently I am focused on Section 3.2 Exact Sequences in \text{Mod}_R ... ... ...
2 replies | 32 view(s)
• Yesterday, 13:47
Let $\mathcal{A}=\{A_\alpha\}$ be an open cover of $X$. $\implies A_\alpha$'s are open sets of $X$ and $\bigcup\limits_\alpha A_\alpha=X$. The...
5 replies | 89 view(s)
• Yesterday, 12:30
Consider the two-element set $\{0,\ 1\}$ equipped with the discrete topology, and form the countably infinite product $\displaystyle X:=\{0,\... 5 replies | 89 view(s) • April 22nd, 2018, 22:40 topsquark replied to a thread Special Relativity in Physics So what we have here is \Delta t' = \frac{\Delta t}{\sqrt{1 - \frac{v^2}{c^2}}} where \Delta t' is measured by the observer's clock and \Delta t... 11 replies | 128 view(s) • April 22nd, 2018, 21:07 topsquark replied to a thread Unsolved Challenge Integral of sine in Challenge Questions and Puzzles Where are you getting these monstrosities from? -Dan 3 replies | 65 view(s) • April 22nd, 2018, 20:27 topsquark replied to a thread Special Relativity in Physics There is a wrinkle here. If we are talking about an observer on Earth then as tkhunny points out there must be some kind of misprint... It can't be... 11 replies | 128 view(s) • April 22nd, 2018, 10:17 MarkFL replied to a thread Olinguito in Introductions Hello, and welcome to MHB! (Wave) 8 replies | 102 view(s) • April 21st, 2018, 19:37 THanks for your generous help, steenis... Peter 5 replies | 434 view(s) • April 21st, 2018, 19:35 Well ... the two standard poodles are intelligent... but quite eccentric ... :) ... Peter 8 replies | 108 view(s) • April 21st, 2018, 16:53 topsquark replied to a thread Diffraction in Physics Yup. Double check the angle on the |n| = 1 interpretation I gave you. I might have screwed up left and right. But in the long run, no, it... 4 replies | 70 view(s) • April 21st, 2018, 14:15 There was no inconvenience, except to you trying to post and to those trying to read the thread. It was bad coding on my part, done before I knew the... 19 replies | 514 view(s) • April 21st, 2018, 13:33 I never knew that. Thanks, I'll have to keep that one in my back pocket. First driving on the wrong side of the road and now this... -Dan 9 replies | 140 view(s) • April 21st, 2018, 13:30 topsquark replied to a thread Diffraction in Physics More or less we can take the sign of sin( \theta ) to be "attached" to the n. A positive n describes the nth minima to the right of the central... 4 replies | 70 view(s) • April 21st, 2018, 13:27 In the process of developing certain number systems I have seen many versions of the notation (a, b). For example: 1) Given any two integers a,... 5 replies | 111 view(s) • April 20th, 2018, 22:16 Update - Version 1.3.1: Bug fix for usernames with special characters. 2 replies | 224 view(s) • April 20th, 2018, 19:16 I have added code to that external script so a single quote in a username won't throw an error, and I edited the post so that only the username is... 19 replies | 514 view(s) • April 20th, 2018, 12:00 Here is this week's POTW: A small bug is placed between two blocks of masses$m_1$and$m_2$($m_1>m_2$) on a frictionless table. A horizontal... 0 replies | 38 view(s) • April 20th, 2018, 11:59 No one answered this week's problem, and my solution is as follows: A formula for power$P\$ we can apply here is: P=\frac{1}{2}\mu\omega^2A^2v...
1 replies | 75 view(s)
• April 20th, 2018, 02:40
As with your last post most of these are plug-n-chug. Do you even know the basics definitions? How do you define the determinant of a 2 x 2 matrix?...
1 replies | 61 view(s)
• April 20th, 2018, 01:31
I am reading Paul E. Bland's book: Rings and Their Modules and am currently focused on Section 2.2 Free Modules ... ... I need someone to check...
1 replies | 52 view(s)
• April 19th, 2018, 19:58
Quite a coincidence ... :) ... Peter
8 replies | 108 view(s)
• April 19th, 2018, 19:51
My apologies steenis ... I did not read your previous post carefully enough ... and somehow (I don't quite know how ??? ) missed your statement : ...
5 replies | 434 view(s)
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### 17 Visitor Messages

1. Hello and welcome back to MHB, Deveno!

We are happy to see that you have returned, and we look forward to your continued participation here!

On Behalf Of MHB's Staff,

anemone.
2. Hi Deveno ... ... Hope you return to MHBs soon ... you are sadly missed ...

Peter
3. Hi Deveno ... haven't seen you for a while ... hope all is well with you ...

Best regards,

Peter
4. Hi Deveno,

work has taken me out of the state of Tasmania and into regional Victoria ... about 150kms outside Melbourne ...

Should re-establish broadband links and get some time in a day or so ...

Thanks as always for you help ...

Peter
5. Hello and welcome back to MHB, Deveno!

We are happy to see that you have returned, and we look forward to your continued participation here!

On Behalf Of MHB's Staff,

anemone.
6. Good answers on Peter's questions, and well-given exercises too. Unfortunately though I wouldn't be able to check Peter's work on the matrix algebras. Every ring is commutative to me
7. Thanks a bunch, I'll see if I can play through your ideas.
8. Hello, David, what d'you think of the group theoretic analogy of galois theory I have posted in the abstract algebra forum? Can this thing be arrow-theoretically generalized to categories too?
9. I'm a little late but congratulations on 1k posts! Really happy to have you at MHB and here's a toast to the next 1k.
10. excellent respond to the "how do you add and subtract measurements" thread. i would not have had the energy to go through all of that step by step like that.
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