The Cork Trick
4:23
3 жыл бұрын
Abstract Algebra 80: Zero divisors
5:31
Abstract Algebra 77: Subrings
14:15
3 жыл бұрын
Abstract Algebra 76: Rings
11:51
3 жыл бұрын
Abstract Algebra 69: Orbits
8:31
3 жыл бұрын
Abstract Algebra 68: Stabilizers
11:28
Abstract Algebra 62: Direct products
10:58
What could Math+YouTube become?
9:44
Пікірлер
@efeturhan596
@efeturhan596 29 күн бұрын
ı had not understood kernel until this video. thank you so much. you are great teacher. You helped me so much. Greetings from Turkey.
@HenryAdamsMath
@HenryAdamsMath 17 күн бұрын
Glad you found it helpful!
@BigKokRomi69
@BigKokRomi69 Ай бұрын
hi, ive been stuck at this problem since forever, How do i show that Q* and R* are not isomorphic? The operation is multiplication for both of them
@HenryAdamsMath
@HenryAdamsMath 17 күн бұрын
The underlying sets are of different cardinalities (Q* is countable and R* is not), so there can be no bijection between them.
@lvlanson
@lvlanson Ай бұрын
Just found your video, I like that you have these topics in short video form. I am enjoying it. Thank you very much, will probably also check out the others :)
@HenryAdamsMath
@HenryAdamsMath 17 күн бұрын
Wonderful!
@besusbb
@besusbb Ай бұрын
Thanks for the explanation
@HenryAdamsMath
@HenryAdamsMath 17 күн бұрын
You are welcome!
@RaeTheActuary
@RaeTheActuary Ай бұрын
awesome, appreciate it, your abstract algebra list is fire
@HenryAdamsMath
@HenryAdamsMath 17 күн бұрын
Glad you're enjoying the series!
@valeriereid2337
@valeriereid2337 2 ай бұрын
I do not follow the mapping. Why does -4 maps to 2 for example.
@HenryAdamsMath
@HenryAdamsMath 17 күн бұрын
Ah! We have that -4 maps to 2 since we have the equality -4 = 2 mod 3. Indeed, since -4+6=2, and since 6 is a multiple of 3, that is why -4 = 2 mod 3.
@valeriereid2337
@valeriereid2337 2 ай бұрын
I didn't fully understand why 1 maps to 1 in the last example.
@HenryAdamsMath
@HenryAdamsMath 17 күн бұрын
Are you referring to the example where Z/4Z maps to Z/2Z by sending j to j mod 2? If so, then 1 maps to 1 since 1 = 1 mod 2.
@valeriereid2337
@valeriereid2337 2 ай бұрын
This is very helpful.
@HenryAdamsMath
@HenryAdamsMath 17 күн бұрын
Glad you found it helpful!
@DingZiyang-d8g
@DingZiyang-d8g 2 ай бұрын
The graphs in the talk are vivid, I like them.
@HenryAdamsMath
@HenryAdamsMath 2 ай бұрын
Thanks!
@valeriereid2337
@valeriereid2337 2 ай бұрын
Wonderful! Thank you Professor Adams. Your lectures make the concepts of abstract algebra easy to understand.
@HenryAdamsMath
@HenryAdamsMath 2 ай бұрын
Thanks!
@valeriereid2337
@valeriereid2337 2 ай бұрын
Thanks for making your lectures available. I am also happy you go for simple notations and not the extra complicated notations.
@HenryAdamsMath
@HenryAdamsMath 2 ай бұрын
Glad you like them!
@valeriereid2337
@valeriereid2337 2 ай бұрын
This certainly helps!
@HenryAdamsMath
@HenryAdamsMath 2 ай бұрын
Wonderful!
@valeriereid2337
@valeriereid2337 2 ай бұрын
This lecture helped me understand the proof of Lagrange's theorem. Thank you.
@HenryAdamsMath
@HenryAdamsMath 2 ай бұрын
Glad to hear it!
@valeriereid2337
@valeriereid2337 2 ай бұрын
Come on, I was just enjoying the visit from Grandpa. Thanks Professor Adams. Your lectures certainly helps.
@HenryAdamsMath
@HenryAdamsMath 2 ай бұрын
Thanks! I'm glad you're finding the lectures helpful.
@valeriereid2337
@valeriereid2337 2 ай бұрын
Thanks Professor Adams. This helps.
@HenryAdamsMath
@HenryAdamsMath 2 ай бұрын
Great!
@valeriereid2337
@valeriereid2337 2 ай бұрын
Thank you Professor Adams, this most certainly helps.
@HenryAdamsMath
@HenryAdamsMath 2 ай бұрын
Glad it was helpful!
@RiteshArora-s9x
@RiteshArora-s9x 2 ай бұрын
How many questions one needs to do from Judson's book ? Thanks. Is this course a first course on algebra ?
@HenryAdamsMath
@HenryAdamsMath 2 ай бұрын
Yes, it is!
@valeriereid2337
@valeriereid2337 3 ай бұрын
Professor do you have anymore lectures from the book you are using here> I would appreciate your lectures.
@valeriereid2337
@valeriereid2337 3 ай бұрын
Thank you so very much. This certainly helps.
@HenryAdamsMath
@HenryAdamsMath 2 ай бұрын
You're very welcome!
@isthisbadbnumber
@isthisbadbnumber 3 ай бұрын
thank you so much 🫶🏻
@HenryAdamsMath
@HenryAdamsMath 2 ай бұрын
You are welcome!
@ghadeeryousif2602
@ghadeeryousif2602 3 ай бұрын
Thank you dr Henry
@HenryAdamsMath
@HenryAdamsMath 2 ай бұрын
You are welcome!
@ritwikpriyadarshi961
@ritwikpriyadarshi961 3 ай бұрын
Thank you! Could not multiply properly before this in cycle form and always had to turn into mappings, this is gonna save a lot of time :)
@HenryAdamsMath
@HenryAdamsMath 2 ай бұрын
Yes, you can multiply in cycle form (to save space).
@anuradhaupadhyay3258
@anuradhaupadhyay3258 3 ай бұрын
Well explained ❤❤ thank you sir
@HenryAdamsMath
@HenryAdamsMath 2 ай бұрын
Thanks!
@tekisasu7550
@tekisasu7550 3 ай бұрын
Thank you for the video! I stumbled upon it and am leaving more satisfied than I was prior.
@HenryAdamsMath
@HenryAdamsMath 2 ай бұрын
Great to hear!
@fatimaginebra8823
@fatimaginebra8823 3 ай бұрын
Thaankk youuu!! This made me understand so much, I'm doing my bachelor's thesis using this and this helped so muchhh!
@HenryAdamsMath
@HenryAdamsMath 2 ай бұрын
Wonderful!
@Rajkumar-uu7te
@Rajkumar-uu7te 3 ай бұрын
Sir can you give 2×2 Matrices which form group but not abelian?
@HenryAdamsMath
@HenryAdamsMath 2 ай бұрын
Correct, the set of invertible 2x2 matrices under matrix multiplication is a group that is not abelian.
@wenzhang365
@wenzhang365 3 ай бұрын
This video is very helpful. Thank you.
@HenryAdamsMath
@HenryAdamsMath 2 ай бұрын
You're very welcome!
@mohammadshirzadi9221
@mohammadshirzadi9221 3 ай бұрын
Thanks!
@HenryAdamsMath
@HenryAdamsMath 2 ай бұрын
No problem!
@SrEstroncio
@SrEstroncio 4 ай бұрын
What is the book being used for this? Thanks
@HenryAdamsMath
@HenryAdamsMath 2 ай бұрын
We are following the book "Understanding and Using Linear Programming" by Jiří Matoušek and Bernd Gärtner link.springer.com/book/10.1007/978-3-540-30717-4
@samyud1819
@samyud1819 4 ай бұрын
I just wanted to find a way to optimize my diet “database” but now I’ve been introduced to linear programming :)
@HenryAdamsMath
@HenryAdamsMath 2 ай бұрын
Haha, great!
@vector8310
@vector8310 5 ай бұрын
Why has this video only drawn under 700 views? It is the only video I've found that actually illustrates the kernel operation with concrete examples. Unlike most videos on the topic, it doesn't just regurgitate definitions that can be found in you average textbook or monograph. This is the sort of content that viewers should demand.
@HenryAdamsMath
@HenryAdamsMath 5 ай бұрын
Glad you liked the video, Vector, much appreciated!
@Gordy-io8sb
@Gordy-io8sb 5 ай бұрын
For the longest time, I pronounced it "a-bell-i-an"...holy.
@Anony1176
@Anony1176 5 ай бұрын
Outstanding video. One of the best video in the KZbin. I am from India sir. Sir can I do a small project in online if possible? It will be really helpful for me. I have completed undergraduate in physics
@HenryAdamsMath
@HenryAdamsMath 5 ай бұрын
Glad you enjoyed the video!
@atulkumaraa267
@atulkumaraa267 6 ай бұрын
Thanks
@HenryAdamsMath
@HenryAdamsMath 5 ай бұрын
You are most welcome!
@pfever
@pfever 6 ай бұрын
You seems like a really cool professor and teach really well! :D
@HenryAdamsMath
@HenryAdamsMath 5 ай бұрын
Thanks so much!
@sadiashahzadi6841
@sadiashahzadi6841 6 ай бұрын
Sir! You are performing good job
@HenryAdamsMath
@HenryAdamsMath 6 ай бұрын
Thanks a lot!
@Lem4212
@Lem4212 6 ай бұрын
great video
@HenryAdamsMath
@HenryAdamsMath 6 ай бұрын
Thanks!
@siddharthb5977
@siddharthb5977 6 ай бұрын
No other choice but subscribe. Why were you not my teacher when I was in college?
@HenryAdamsMath
@HenryAdamsMath 6 ай бұрын
Thanks for subscribing!
@siddharthb5977
@siddharthb5977 6 ай бұрын
Wow! Simple and effective, I really like the way you teach.
@HenryAdamsMath
@HenryAdamsMath 6 ай бұрын
Thank you!
@riyakeerthana3136
@riyakeerthana3136 6 ай бұрын
Thank u for ur crystal clear explanation
@HenryAdamsMath
@HenryAdamsMath 6 ай бұрын
You're most welcome!
@kressmax
@kressmax 8 ай бұрын
Very well done!
@HenryAdamsMath
@HenryAdamsMath 7 ай бұрын
Thank you very much!
@mahmoodalmohri4805
@mahmoodalmohri4805 8 ай бұрын
Thank you for your demonstration. My question is that how do we assign the arbitrary value between 0 and 1 to each vertex? Earlier it was easier to do that, since I knew that if I chose the vertex to be in the vertex cover, then its value is one, and zero otherwise. But now how does each vertex get assigned their value?
@HenryAdamsMath
@HenryAdamsMath 7 ай бұрын
You assign the value between 0 and 1 by solving the relaxed linear programming problem, for example using the simplex algorithm, which is computationally very efficient!
@user-gf4jz7li8s
@user-gf4jz7li8s 8 ай бұрын
Hi Henry! Is the distributivity proved by the other basic axioms or on its own?
@HenryAdamsMath
@HenryAdamsMath 7 ай бұрын
My understanding is that the distributivity axiom does not follow from the other axioms, and that it is therefore necessary to include as an axiom of its own!
@RamatuYahaya-gq7hz
@RamatuYahaya-gq7hz 8 ай бұрын
Find the rule of the mapping
@shayquaza3207
@shayquaza3207 8 ай бұрын
you're the goat bro <3
@HenryAdamsMath
@HenryAdamsMath 7 ай бұрын
Appreciate it!
@aminmdal7043
@aminmdal7043 8 ай бұрын
i have some problems with integer linear programming. i want to discuss with you. how can contract with?
@021scorpion
@021scorpion 8 ай бұрын
Thank you so much for all your hard work, you videos have been tremendously helpful! I just have a quick question, this sounds counterintuitive but I think what I just learned from this video is that any finite abelian group of let's say size 72 is isomorphic to products of cyclic groups (all 6 of them) but those 6 groups are not isomorphic to each other. intuitively it would make sense if the abelian group of size 72 would only be isomorphic to Z/8Z x Z/9Z because 8 and 9 are relatively prime. Also did we not learn if A is isomorphic to B and B is isomorphic to C then A is also isomorphic to C? in here we have an abelian group of size 72 being isomorphic to Z/8Z x Z/9Z and also the same abelian group is isomorphic to Z/2Z x Z/4Z x Z/9Z for example, but Z/8Z x Z/9Z is not isomorphic to Z/2Z x Z/4Z x Z/9Z because the orders are different so how is this possible that the abelian group would be isomorphic to them both? Won't the abelian group of size 72 must have elements of certain orders in which it would be different than some of these products? I am a little confused on this part and apologize for writing so much lol. Thanks in advance.
@HenryAdamsMath
@HenryAdamsMath 7 ай бұрын
It is not true that any abelian group of size 72 is isomorphic to Z/8Z x Z/9Z --- that is only one of six possibilities that an abelian group of size 72 could be isomorphic to. Yes, it is true that if A is isomorphic to B and B is isomorphic to C, then A is isomorphic to C. No, it is not the case that Z/8Z x Z/9Z is isomorphic to Z/2Z x Z/4Z x Z/9Z --- these are two different abelian groups of size 72 that are not isomorphic to each other. You seem to be assuming that there is a single abelian group of size 72 --- but this is not correct ---- up to isomorphism there are six different groups of size 72 !
@jack-sk5st
@jack-sk5st 8 ай бұрын
Can you give me the source code of the ellipsoid algorithm?
@hoganchou1969
@hoganchou1969 8 ай бұрын
what an informative lecture
@HenryAdamsMath
@HenryAdamsMath 7 ай бұрын
Thank you!
@fatalfoot7579
@fatalfoot7579 8 ай бұрын
Amazing video, thank you very much, helped me a lot !!!
@HenryAdamsMath
@HenryAdamsMath 7 ай бұрын
Glad it helped!