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Yesterday,
22:16
MarkFL
replied to a thread
BBCode For Username HTML Markup
in
vBulletin Products
Update - Version 1.3.1: Bug fix for usernames with special characters.
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2 replies | 198 view(s)
Yesterday,
19:16
MarkFL
replied to a thread
Error 502, bad gateway
in
Questions, Comments, and Feedback
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...
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15 replies | 420 view(s)
Yesterday,
12:00
MarkFL
started a thread
Problem Of The Week #310 Apr 20th, 2018
in
POTW for Secondary School/High School Students
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...
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0 replies | 20 view(s)
Yesterday,
11:59
MarkFL
replied to a thread
Problem Of The Week #309 Apr 12th, 2018
in
POTW for Secondary School/High School Students
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...
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1 replies | 63 view(s)
Yesterday,
01:31
Peter
started a thread
Finitely Generated Modules - Bland Problem 1(a), Problem Set 2.2
in
Linear and Abstract Algebra
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...
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1 replies | 31 view(s)
April 19th, 2018,
19:58
Peter
replied to a thread
Ring Direct Products ... Bland Problem 3(a), Problem Set 2.1, Page 49 ...
in
Linear and Abstract Algebra
Quite a coincidence ... :) ... Peter
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7 replies | 91 view(s)
April 19th, 2018,
19:51
Peter
replied to a thread
Free Modules, Bases and Direct Sums/Products - Bland, Proposition 2.2.3
in
Linear and Abstract Algebra
My apologies steenis ... I did not read your previous post carefully enough ... and somehow (I don't quite know how ??? ) missed your statement : ...
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4 replies | 409 view(s)
April 19th, 2018,
16:28
Evgeny.Makarov
replied to a thread
Formal vs. informal - Numerical Functions
in
Computer Science
I would say, yes. Plus, if "effectively" is a statement about resources, then the algorithm takes reasonable time and storage. But it may sound this...
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4 replies | 46 view(s)
April 19th, 2018,
16:09
Evgeny.Makarov
replied to a thread
Formal vs. informal - Numerical Functions
in
Computer Science
It would be helpful to know the context. If "effectively" means "with reasonable resources, i.e., time and storage", then it means precisely that:...
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4 replies | 46 view(s)
April 18th, 2018,
23:19
Peter
replied to a thread
Free Modules, Bases and Direct Sums/Products - Bland, Proposition 2.2.3
in
Linear and Abstract Algebra
Hi Steenis, Just reworking Section 2.2 of Bland ... and in particular Proposition 2.2.3 ... In the above post you write: "... ... (3) =>...
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4 replies | 409 view(s)
April 18th, 2018,
19:34
Peter
replied to a thread
Ring Direct Products ... Bland Problem 3(a), Problem Set 2.1, Page 49 ...
in
Linear and Abstract Algebra
Hugo and Pierre are the names of my friends large standard poodles ... Peter
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7 replies | 91 view(s)
April 17th, 2018,
20:55
Peter
replied to a thread
Ring Direct Products ... Bland Problem 3(a), Problem Set 2.1, Page 49 ...
in
Linear and Abstract Algebra
Hi Steenis ... sorry to be slow in responding ... But Hugo (one of my friends large standard poodles - Hugo and Pierre...) chewed up my glasses...
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7 replies | 91 view(s)
April 15th, 2018,
20:01
MarkFL
replied to a thread
A Difficult Partial Sum
in
Pre-Calculus
Awesome work, as always Chris! (Yes) Using your post, where the base case and induction statement have been given, then the induction step would...
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6 replies | 124 view(s)
April 15th, 2018,
12:02
MarkFL
replied to a thread
A Difficult Partial Sum
in
Pre-Calculus
Here are the choices: A.) \frac{1}{2} B.) \frac{1}{2}-\frac{2^{2006}}{3^{2^{2006}}-1} C.) \frac{1}{2}-\frac{2^{2005}}{3^{2^{2005}}-1} D.)...
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6 replies | 124 view(s)
April 14th, 2018,
23:54
Peter
started a thread
Ring Direct Products ... Bland Problem 3(a), Problem Set 2.1, Page 49 ...
in
Linear and Abstract Algebra
I am reading Paul E. Bland's book: Rings and Their Modules and am currently focused on Section 2.1 Direct Products and Direct Sums ... ... I need...
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7 replies | 91 view(s)
April 14th, 2018,
10:56
MarkFL
replied to a thread
A Difficult Partial Sum
in
Pre-Calculus
The actual sum he's given is: S=\sum_{k=0}^{2006}\left(\frac{2^k}{3^{2^k}+1}\right) And he's given several choices for the result. I was hoping...
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6 replies | 124 view(s)
April 14th, 2018,
10:10
MarkFL
started a thread
A Difficult Partial Sum
in
Pre-Calculus
Hello MHB! (Wave) A young man in high school I know has been essentially tasked with finding the following partial sum: ...
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6 replies | 124 view(s)
April 14th, 2018,
06:19
Peter
replied to a thread
Direct Products of Rings and Ideals ... Bland Probem 2(b), Section 2.1 ... ...
in
Linear and Abstract Algebra
THanks Steenis ... ... well, staying with a friend who doesn't drink ... But had a couple of drinks of whisky and soda last night ... :) ... ...
see more
2 replies | 42 view(s)
April 14th, 2018,
04:14
Peter
started a thread
Direct Products of Rings and Ideals ... Bland Problem 2(c), Section 2.1 ... ...
in
Linear and Abstract Algebra
I am reading Paul E. Bland's book: Rings and Their Modules and am currently focused on Section 2.1 Direct Products and Direct Sums ... ... I need...
see more
1 replies | 37 view(s)
April 13th, 2018,
22:46
Peter
started a thread
Direct Products of Rings and Ideals ... Bland Probem 2(b), Section 2.1 ... ...
in
Linear and Abstract Algebra
I am reading Paul E. Bland's book: Rings and Their Modules and am currently focused on Section 2.1 Direct Products and Direct Sums ... ... I need...
see more
2 replies | 42 view(s)
April 13th, 2018,
02:28
Peter
replied to a thread
External Direct Sums and Direct Products ... Bland Problem 1, Section 2.1 ...
in
Linear and Abstract Algebra
Hi steenis ... Continuing the proof of ... \Delta is a finite set \Longrightarrow \prod_\Delta M_\alpha = \bigoplus_\Delta M_\alpha ...
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17 replies | 214 view(s)
April 12th, 2018,
20:03
Peter
replied to a thread
External Direct Sums and Direct Products ... Bland Problem 1, Section 2.1 ...
in
Linear and Abstract Algebra
THanks Steenis ... ... very helpful to have your confirmation ... Peter
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17 replies | 214 view(s)
April 12th, 2018,
11:47
MarkFL
replied to a thread
Hello from Pan
in
Introductions
Hello, and welcome to MHB panpan! (Wave)
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6 replies | 86 view(s)
April 12th, 2018,
11:15
MarkFL
started a thread
Problem Of The Week #309 Apr 12th, 2018
in
POTW for Secondary School/High School Students
Hello, MHB Community! (Wave) anemone has asked me to stand in for her for a few weeks, so please be gentle. (Bigsmile) Here is this week's...
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1 replies | 63 view(s)
April 12th, 2018,
11:11
MarkFL
replied to a thread
Problem Of The Week #308 Apr 6th, 2018
in
POTW for Secondary School/High School Students
Hello MHB Community! (Wave) I am going to stand in for anemone for a few weeks. Congratulations to the following for their correct submissions:...
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1 replies | 129 view(s)
April 12th, 2018,
03:51
Peter
replied to a thread
External Direct Sums and Direct Products ... Bland Problem 1, Section 2.1 ...
in
Linear and Abstract Algebra
Hi steenis ... Continuing the proof of ... \Delta is a finite set \Longrightarrow \prod_\Delta M_\alpha = \bigoplus_\Delta M_\alpha ......
see more
17 replies | 214 view(s)
April 12th, 2018,
00:42
Peter
replied to a thread
External Direct Sums and Direct Products ... Bland Problem 1, Section 2.1 ...
in
Linear and Abstract Algebra
Hi steenis ... Continuing the proof of ... \Delta is a finite set \Longrightarrow \prod_\Delta M_\alpha = \bigoplus_\Delta M_\alpha ......
see more
17 replies | 214 view(s)
April 11th, 2018,
23:13
Peter
replied to a thread
External Direct Sums and Direct Products ... Bland Problem 1, Section 2.1 ...
in
Linear and Abstract Algebra
Hi steenis ... I have been reflecting on your proof using Proposition 2.1.6 ... I must confess that I do not fully understand the underlying...
see more
17 replies | 214 view(s)
April 11th, 2018,
22:19
Peter
replied to a thread
External Direct Sums and Direct Products ... Bland Problem 1, Section 2.1 ...
in
Linear and Abstract Algebra
Hi steenis ... Sorry to be slow in answering ... have temporarily left my home state of Tasmania and am travelling through the mainland state of...
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17 replies | 214 view(s)
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April 11th, 2018
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Person A: Knock, knock....
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April 10th, 2018
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Re: Deduction
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S_{\infty}=\sum_{k=1}^{\i...
April 9th, 2018
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topsquark
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Re: Deduction
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Evgeny.Makarov
S_{\infty}=\sum_{k=1}^{\i...
April 8th, 2018
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Evgeny.Makarov
Formally a category is a...
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Formally a category is a...
April 6th, 2018
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Given $f$ and $g$ I can...
April 5th, 2018
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Re: Why is Pi an irrational number?
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I read your post at...
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Re: Why is Pi an irrational number?
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Re: Why is Pi an irrational number?
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Secondly what I meant by...
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Re: Why is Pi an irrational number?
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Re: Why is Pi an irrational number?
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If Pi is the ratio of a...
April 4th, 2018
22:36 -
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Re: Why is Pi an irrational number?
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Re: Why is Pi an irrational number?
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