Remember?
Forums
New Posts
FAQ
Community
View Site Leaders
Thanks / Like Statistics
Hottest Threads / Posts
Quick Links
Today's Posts
This Week's Posts
Mark Forums Read
Articles
Blogs
Donate
Register
MHB Info
MHB About Us
MHB Rules
MHB Widgets
MHB Flyers
MHB Blog
P.O.T.W.
For Fun
Arcade
Live Chat
Advanced Search
Member List
Evgeny.Makarov
Register Now!
It is Free
Math Help Boards
We are an online community that gives free mathematics help any time of the day about any problem, no matter what the level. You will have to register before you can post. To start viewing messages, select the forum that you want to visit from the selection below.
Evgeny.Makarov
MHB Master
MHB Site Helper
MHB Math Scholar
Find latest posts
Find latest started threads
View Articles
View Blog Entries
Report Profile
Mini Statistics
Status
Offline
Join Date
January 30th, 2012
Last Activity
April 4th, 2020
17:39
Blog Entries
0
More
9
Friends
Fantini
Peter
dwsmith
Sudharaka
MarkFL
ZaidAlyafey
Recent Visitors
The last 10 visitor(s) to this page were:
agapito
,
Alan
,
Cbarker1
,
conscipost
,
Dhamnekar Winod
,
goohu
,
Klaas van Aarsen
,
LesPaindy
,
Olinguito
,
Peter
This page has had
25,520
visits
Tab Content
Evgeny.Makarov's Activity
About Me
Friends
Post Thanks / Like
My Awards
Tab Content
All
Evgeny.Makarov
Friends
Photos
New Activity (
)
Please reload this page to view the 200+ new activity items that have been created.
Older Activity
April 3rd, 2020,
22:31
Peter
started a thread
Continuity in Topological Spaces ... M & M, Lemma 3.2 (ii) ... ...
in
Topology and Advanced Geometry
I am reading Aisling McCluskey and Brian McMaster: Undergraduate Topology, Oxford University Press, 2014... ... and am currently focused on Chapter...
see more
1 replies | 198 view(s)
March 28th, 2020,
16:11
Evgeny.Makarov
replied to a thread
Please help with bool algebra and logic things!
in
Discrete Mathematics, Set Theory, and Logic
Welcome to the forum! I guess that "between" is supposed to mean "among", but I am not sure about "even". If it means "at least", then the...
see more
2 replies | 240 view(s)
March 26th, 2020,
21:12
Peter
started a thread
The Order Topology ... ... Singh, Example 1.4.4 ... ...
in
Topology and Advanced Geometry
I am reading Tej Bahadur Singh: Elements of Topology, CRC Press, 2013 ... ... and am currently focused on Chapter 1, Section 1.4: Basis ... ......
see more
0 replies | 152 view(s)
March 26th, 2020,
14:09
evinda
replied to a thread
Find the matrix A
in
Linear and Abstract Algebra
Nice... (Smirk) Thank you very much!!! (Blush)
see more
12 replies | 413 view(s)
March 25th, 2020,
20:13
Evgeny.Makarov
replied to a thread
Sage dl
in
Mathematics Software and Calculator Discussion
I've been using Sage for generating problems in linear algebra and graph theory. It has nice functions for generating random matrices with integer...
see more
1 replies | 118 view(s)
March 25th, 2020,
17:24
evinda
replied to a thread
Find the matrix A
in
Linear and Abstract Algebra
Yes, it does... (Nod) So is this sufficient to say that since it has to hold for every $\lambda$, it has to hold that $a_{12}=a_{22}=0$ and so the...
see more
12 replies | 413 view(s)
March 25th, 2020,
15:43
evinda
replied to a thread
Find the matrix A
in
Linear and Abstract Algebra
Oh sorry... We get that $3 \cdot x_1+ 0 \cdot x_2=3 \Rightarrow x_1=1$, and $x_2$ is arbitrary, so it is indeed a solution... (Wasntme)
see more
12 replies | 413 view(s)
March 25th, 2020,
15:36
evinda
replied to a thread
Find the matrix A
in
Linear and Abstract Algebra
This is wrong, since we would have the following: $$\begin{bmatrix} 1 & 0\\ 3 & 0 \end{bmatrix} \begin{bmatrix} x_{1} \\ x_{2}...
see more
12 replies | 413 view(s)
March 25th, 2020,
14:24
evinda
replied to a thread
Find the matrix A
in
Linear and Abstract Algebra
So whichever value $\lambda$ has, we should get the same matrix $A$. This is only possible when $a_{12}=a_{22}=0$. Thus, $A=\begin{bmatrix} 1...
see more
12 replies | 413 view(s)
March 25th, 2020,
14:08
evinda
replied to a thread
Find the matrix A
in
Linear and Abstract Algebra
Oh yes, right... (Thinking) Even if we pick, for example, $\lambda=0$, we do not get a specific matrix $A$. How can we get further information?...
see more
12 replies | 413 view(s)
March 24th, 2020,
21:54
Peter
started a thread
Subbasis for a Topology ... Singh, Section 1.4 ... Another Question ... ...
in
Topology and Advanced Geometry
I am reading Tej Bahadur Singh: Elements of Topology, CRC Press, 2013 ... ... and am currently focused on Chapter 1, Section 1.4: Basis ... ... ...
see more
0 replies | 144 view(s)
March 24th, 2020,
21:36
Peter
replied to a thread
Subbasis for a Topology ... Singh, Section 1.4 ...
in
Topology and Advanced Geometry
Thanks GJA ... I appreciate your help ... Peter
see more
2 replies | 182 view(s)
March 24th, 2020,
14:52
evinda
started a thread
Find the matrix A
in
Linear and Abstract Algebra
Hello!!! (Wave) The general solution of the system $Ax=\begin{bmatrix} 1\\ 3 \end{bmatrix}$ is $x=\begin{bmatrix} 1\\ 0 \end{bmatrix}+...
see more
12 replies | 413 view(s)
March 23rd, 2020,
03:05
Peter
started a thread
Capital Tau
in
LaTeX Help and Discussion
In a recent post I wanted to use a capital tau ... and so typed \mathcal{ \Tau_1 } but generated an error ... Can someone please help ... ... ...
see more
2 replies | 136 view(s)
March 23rd, 2020,
02:51
Peter
started a thread
Subbasis for a Topology ... Singh, Section 1.4 ...
in
Topology and Advanced Geometry
I am reading Tej Bahadur Singh: Elements of Topology, CRC Press, 2013 ... ... and am currently focused on Chapter 1, Section 1.4: Basis ... ... ...
see more
2 replies | 182 view(s)
March 19th, 2020,
22:50
Peter
replied to a thread
Convergence in Topological Spaces ... Singh, Example 4.1.1 ... ...Another Question ...
in
Topology and Advanced Geometry
Thanks Oxide ... I really appreciate your help ... Peter
see more
2 replies | 244 view(s)
March 19th, 2020,
06:00
Peter
started a thread
Convergence in Topological Spaces ... Singh, Example 4.1.1 ... ...Another Question ...
in
Topology and Advanced Geometry
I am reading Tej Bahadur Singh: Elements of Topology, CRC Press, 2013 ... ... and am currently focused on Chapter 4, Section 4.1: Sequences ... ...
see more
2 replies | 244 view(s)
March 19th, 2020,
05:41
Peter
replied to a thread
Convergence in Topological Spaces ... Singh, Example 4.1.1 ... ...
in
Topology and Advanced Geometry
Hi GJA ... .. Thanks so much for the help ... Peter
see more
2 replies | 220 view(s)
March 18th, 2020,
22:20
Peter
started a thread
Convergence in Topological Spaces ... Singh, Example 4.1.1 ... ...
in
Topology and Advanced Geometry
I am reading Tej Bahadur Singh: Elements of Topology, CRC Press, 2013 ... ... and am currently focused on Chapter 4, Section 4.1: Sequences ... ...
see more
2 replies | 220 view(s)
March 18th, 2020,
22:04
Peter
replied to a thread
Boundary of Subset in a Topological Space ... Singh Theorem 1.3.10 ... ...
in
Topology and Advanced Geometry
Thanks Evgeny ... Your post turned out to be really helpful ... Appreciate your help ... Peter
see more
2 replies | 185 view(s)
March 15th, 2020,
17:13
Evgeny.Makarov
replied to a thread
Boundary of Subset in a Topological Space ... Singh Theorem 1.3.10 ... ...
in
Topology and Advanced Geometry
Yes, your suggestion is correct. We need to show that $x\in \bar{A}=A\cup(\bar{A}-A)$ implies $x\in A\cup\partial A$. This requires considering...
see more
2 replies | 185 view(s)
March 15th, 2020,
02:15
Peter
started a thread
Boundary of Subset in a Topological Space ... Singh Theorem 1.3.10 ... ...
in
Topology and Advanced Geometry
I am reading Tej Bahadur Singh: Elements of Topology, CRC Press, 2013 ... ... and am currently focused on Chapter 1, Section 1.2: Topological ...
see more
2 replies | 185 view(s)
March 14th, 2020,
19:42
Peter
replied to a thread
Limit Points and Closure in a Topological Space ... Singh, Theorem 1..3.7 ... ...
in
Topology and Advanced Geometry
Thanks for the help, Opalg ... really appreciate it ... Just working through what you have written ... Thanks again ... Peter
see more
2 replies | 98 view(s)
March 14th, 2020,
04:03
Peter
started a thread
Interior of a Topological Space ... Singh, Proposition 1.3.2 (a) ... ...
in
Topology and Advanced Geometry
I am reading Tej Bahadur Singh: Elements of Topology, CRC Press, 2013 ... ... and am currently focused on Chapter 1, Section 1.2: Topological ...
see more
1 replies | 64 view(s)
March 13th, 2020,
23:08
Peter
started a thread
Limit Points and Closure in a Topological Space ... Singh, Theorem 1..3.7 ... ...
in
Topology and Advanced Geometry
I am reading Tej Bahadur Singh: Elements of Topology, CRC Press, 2013 ... ... and am currently focused on Chapter 1, Section 1.2: Topological Spaces...
see more
2 replies | 98 view(s)
March 10th, 2020,
22:58
Peter
replied to a thread
Closed Subsets in a Toplogical space ...
in
Topology and Advanced Geometry
Thanks HallsofIvy ... appreciate your help ... Peter
see more
2 replies | 235 view(s)
March 8th, 2020,
21:51
Peter
started a thread
Closed Subsets in a Toplogical space ...
in
Topology and Advanced Geometry
I am reading Sasho Kalajdzievski's book: "An Illustrated Introduction to Topology and Homotopy" and am currently focused on Chapter 3: Topological...
see more
2 replies | 235 view(s)
More Activity
No More Results
No Recent Activity
About Evgeny.Makarov
Basic Information
About Evgeny.Makarov
Country Flag:
Russian Federation
Statistics
Total Posts
Total Posts
2,483
Posts Per Day
0.83
Thanks Data
Thanks Given
533
Thanks Received
4,408
Thanks Received Per Post
1.775
General Information
Last Activity
April 4th, 2020
17:39
Last Visit
April 4th, 2020 at 13:43
Last Post
March 28th, 2020 at 16:11
Join Date
January 30th, 2012
Referrer
Jester
Referrals
2
Referred Members
Andrei
,
jasper
9
Friends
bwpbruce
Offline
MHB Apprentice
dwsmith
Offline
MHB Master
evinda
Offline
MHB Master
Fantini
Offline
MHB Craftsman
Henry R
Offline
MHB Apprentice
MarkFL
Offline
Pessimist Singularitarian
Peter
Offline
MHB Master
Sudharaka
Offline
MHB Master
ZaidAlyafey
Offline
زيد اليافعي
Showing Friends 1 to 9 of 9
March 26th, 2020
00:12 -
karush
clicked Thanks for this post:
Re: Sage dl
by
Evgeny.Makarov
I've been using Sage for...
March 25th, 2020
22:08 -
topsquark
clicked Thanks for this post:
Re: Sage dl
by
Evgeny.Makarov
I've been using Sage for...
March 15th, 2020
19:44 -
Peter
clicked Thanks for this post:
Re: Boundary of Subset in a Topological Space ... Singh Theorem 1.3.10 ... ...
by
Evgeny.Makarov
Question 1 Why is it...
Ranks Showcase - 13 Ranks
Icon
Image
Description
Name:
MHB University Math Award (2018)
Issue time: March 3rd, 2019 18:05
Issue reason: Congrats, Evgeny!
Name:
MHB Humor Award (2017)
Issue time: January 21st, 2018 09:45
Issue reason: Congratulations!
Name:
MHB Discrete Mathematics Award (2017)
Issue time: January 21st, 2018 09:41
Issue reason: Congratulations!
Name:
MHB Chat Room Award (2016)
Issue time: January 9th, 2017 14:40
Issue reason:
Name:
MHB Humor Award (2016)
Issue time: January 9th, 2017 14:40
Issue reason:
Name:
MHB Discrete Mathematics Award (2016)
Issue time: January 9th, 2017 14:36
Issue reason:
Name:
MHB Best Ideas Award (2015)
Issue time: January 7th, 2016 11:10
Issue reason:
Name:
MHB Discrete Mathematics Award (2015)
Issue time: January 7th, 2016 11:08
Issue reason:
Name:
MHB Humor Award (2014)
Issue time: January 3rd, 2015 15:30
Issue reason:
Name:
MHB LaTeX Award (2014)
Issue time: January 3rd, 2015 15:28
Issue reason:
Name:
MHB Discrete Mathematics Award (2014)
Issue time: January 3rd, 2015 15:28
Issue reason:
Name:
MHB LaTeX Award (Jan-June 2013)
Issue time: July 1st, 2013 22:15
Issue reason:
Name:
MHB Discrete Mathematics Award (Jan-June 2013)
Issue time: July 1st, 2013 22:03
Issue reason: