I see Professor Brailsford, I click. He's one of the people on this channel who can break any concept down into tasty nibbles. Oh oops forgot to mention : NOW send him to IBM to ask them snarky questions about their new Quantum Computer.

It's such a pleasure to watch the professor. Brilliance, passion, and a gift for explaining.

8:32 ”If you want to divide by n, it's the same as multiplying by 1/n." _Prof. Brailsford, 2019_

Does this mean a sequel on Galois fields? I’ve been hoping for a computerphile video on Galois fields since I first tried to wrap my mind around AES

I love all the people that are in these videos, but I have a special love for Professor Brailsford.

For those wondering the significance of 0 for addition and 1 for multiplication (those unfamiliar with abstract algebra) the reason is that 0 is the "identity element" for addition, and 1 is the identtiy element for multiplication ie 0 + anything = anything, and 1 x anything = anything. This can (and is) generalized to other operations as well and the same ideas apply.

Looking forward to the next video!

me feel big brain watching smart number video

It's been 5 years since a Computerphile video on "extra bit" logic (ternary etc.) I think with the recent attention to IBM's new quantum computer this would make a quite popular, and important video.

Can you ask the professors about design patterns. I'd like to hear a video where they talk about the gang of four and the history of design patterns

Professor Brailsford. Such a lovely chap. :-)

I only kinda vaguely grasp the nuances of this, but it's interesting nonetheless. And Prof. Brailsford delivers it so compellingly. Amazing presenter.

Absolutely fun challenge, thank you. M.

This is fantastic!

ISBN-10 uses descending weighting in the real world, so the check digit usually only has a weight of 1, whereas the first digit will have a weight of 10.

You did an episode on Unix, could you do one about BSD? That would be really nice.

Hello Professor, can you make a video on how low latency applications work - for eg Trading Applications ? What is the skill set required for developing such applications ?

1:24 Will I be able to overcome the challenge? I hope so, but turns out if you just put the first nine digits into a search engine, you get the answer immediately. Now on to watching the rest of the video ...

That end smells very distinctively of polynomial division.

1:22 Quantum Chill aka. Young Galois, I miss you

Did the next video in this series ever get made?

At 18:10 -- you have to be able to find a '1' on every single row of the table *except* the 0 row. That one gets to be special.

I can tell due to the format of the ISBN having a large registrant element that it must be from a large publisher.

i am lost. i am not a native speaker and i seem to have lost sth there. what is the subject of the video?

You point to 0 as the "additive inverse" and 1 as the "multiplicative inverse" when they're actually called the "additive identity" and "multiplicative identity"

The x windowing system would be a cool video topic

Hit or miss, I guess they never miss 1:23

Hey I understand some of these words!

I was thinking "What does the windowing server have to do with two people having the same book and sending secret messages to each other?"

computerphile meets group theory! numberphile will be twitching!

Little Feat are an awesome band!

I figured it'd be K&R C but hey, awk is cool too

How hilarious would it have been if the book he'd chosen as the answer was either Faust or something by Furst.

Apparently he is also a gangster in LA.

First. I apologize. This is actually the only time I’ve been first on a video and I find it quite poetically beautiful that it has happened on a video that specifically requests that you abstain from “firsting”.

The AWK Programming Language

Algebra

4:49

You hurt my head

I feel like I walked into a lecture late by about 15 minutes. I guess my primary mis-assumption was that "book code" referred to encryption, and hearing about weighted checksums and the mention of prime numbers did nothing to dispel this. But since he was going on and on about ISBN numbers, then I thought maybe this was a way of including the key (i.e., a coded representation of the book on which the code is based) in the coded message, leading me further astray. By the time I realized what this was about, I had lost all interest!

Remainders - another root from the literary tradition?

6204th MOD 1

I always wonder what would be the reason to dislike this video?

NOT FIRST!

📺💬 Modulation and calculation of the ISBN mode for verification and categorization. 🥺💬 We also have experience with modulo verification such as Thai citizen ID number, Passport, and many applications that are using the same method or enchant with alphanumeric where it can verify the series without source access but with source access, it quickly searches for the categories or properties. 🧸💬 Can you give more examples off the edges of security information anyway car plates or other registration are running numbers and random selection and modulation we also use it with caseID and information ID generated or haze it as a string? 🐑💬 I want to see the error correction using modulation, we had learned about multi-phase signals, and the error correction combined with the signaling property creates something like hamming radios that resistance to radios interferes. 🥺💬 Everything starts from a small but see now today what applied the modulo agilities⁉ 📺💬 Adjective inverse 2 behaves like 3 - 1 when the modulo of 3 becomes 0 the result is [ 1, 2, 0 ] or it is remainder to the N - 1. 🐑💬 It creates factorials or identical when modulo with prime number and we can keep the set of prime numbers in a secret chamber only the source can read from its messages. 🥺💬 In programming, we do not modulo of input to create another input but the inverse modulo is a fast calculation compared to multiple-time multiplication for reading a message. 🦭💬 Working functions we called modules because frequent output and sensors are modulated by the modulator and somebody thinks the meaning comes from replaceable but it is not.

Says 3 holds up 4 fingers

i wish i have half this mans knowledge I'll be a millionaire in no time

The AWK Programming Language... but you do realize we have google, right?

0 x 0 = 1

prawn = u-dang

Blehhhhhhhh, this hurts me in the abstract algebra :'(

Brailsford

31267st!

AWK? :P

First my friendo

i would have just solved 10c as 10c = -c = 1 = -10, c=10, generally this halves the amount of work you need to do.

First (modulo 11)

First!

FIRST

Zeroth

First! *races off*

first

First! Sorry.

Zeroth! :D

10:18 >"by doing a multiply and and addition table for 3" >holds up four fingers I see Prof. Brailsford uses an index-0 numbering system.

First. Almost

!=first

First

ISBN 020107981x The AWK Programming Language by Kernighan et al....

The AWK Programming Language

First!

first

The AWK Programming Language

The AWK Programming Language

The AWK Programming Language

first