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mna_ commented on Sheafification – The optimal path to mathematical mastery: The fast track (2022)   sheafification.com/the-fa... · Posted by u/atomicnature
lambdas · 12 hours ago
Shivlov for the one and only text in linear algebra is rough. IMO, it’s a little terse and fast paced. Efficient if you’re already well versed enough to be dangerous, but otherwise I think might slow down the beginner to a crawl in places.

Same for Hartshorne’s Algebraic Geometry. Neither of these are bad textbooks at all, they both have a place on my bookshelf, but certainly better options have appeared through the years (for AG, I’d be remiss to mention Ravi Vakil’s fantastic The Rising Sea, due for a physical publishing October, and Ulrich Görtz & Torsten Wedhorn two part series)

mna_ · 12 hours ago
What would you recommend as a supplement to Shilov's LA book?
mna_ commented on Enrollment at trade schools is expected to grow   finance.yahoo.com/news/ai... · Posted by u/m-hodges
BenFranklin100 · 17 hours ago
This is good news for society. Too many young men have fallen behind in the last ten years and young women now outpace them in college. It’s great young women are doing well, but if young men don’t have a parallel career path, they may become disheartened about their future, and we end up with a large cohort of disenchanted young men and political instability. The trades can provide an alternative non-college career path for these young men.
mna_ · 13 hours ago
But do highly educated women want to date and marry plumbers, mechanics, bricklayers, plasterers, etc? Women almost always date upwards.
mna_ commented on British Summers Are Getting Hotter. So Are Houses   nytimes.com/2025/08/27/wo... · Posted by u/bookofjoe
mna_ · 2 days ago
This year wasn't bad at all. I live in London and we had 1 week of 29-31C weather during which internal temps were around 27-28C. Then the "heatwave" passed and internal temps went down to around 24-25C. The obsession Americans have with Europe embracing AC is strange. Do they want to sell us AC units? Is that why? Is this a business opportunity that they're trying to push?
mna_ commented on Africa wants to redraw the world map   washingtonpost.com/world/... · Posted by u/Thevet
abstractspoon · 4 days ago
I hope this gets traction
mna_ · 4 days ago
Why? Maps are not what's holding Africa and Africans back. It's such a non-issue.
mna_ commented on Denmark summons top US diplomat over alleged Greenland influence operation   bbc.com/news/articles/c0j... · Posted by u/vinni2
vincnetas · 4 days ago
HN readers from USA, what the hell is happening. How do we "get back to normal"?
mna_ · 4 days ago
Americans have been doing things like this for a while. It's just that they're doing it to their "allies" now.
mna_ commented on Nick Clegg: If the people who ran FB were monsters, I wouldn't have worked there   theguardian.com/politics/... · Posted by u/donsupreme
mna_ · 7 days ago
This is the guy who did nothing while his buddy, Cameron, enacted austerity measures that have destroyed the nation. He's a monster.
mna_ commented on Ask HN: What's the current state of ethical hacking culture?    · Posted by u/kace91
mna_ · 7 days ago
Many communities have moved away from IRC to Discord, which is very unfortunate.
mna_ commented on Russian hackers seized control of Norwegian dam, spy chief says   theguardian.com/world/202... · Posted by u/isaacfrond
mna_ · 17 days ago
Why are dams, nuclear reactors, power stations, etc. even connected to the internet? I remember watching one of the Matrix movies as a teen and there's a scene in which Trinity hacks into a power station and I laughed mentally and thought there's no way that'd happen IRL. Whoops lol.
mna_ commented on 500 days of math   gmays.com/500-days-of-mat... · Posted by u/gmays
mtts · 17 days ago
You can, but you will spend a lot of time figuring out what it is that you need to study and where your weak points are. MathAcademy does that for you so you can spend your precious studying time on, well, what you need to study.

I think it’s very expensive, and the correct price should be €$25/ month at most, imho, but its spaced repetition system definitely provides value over self study.

mna_ · 17 days ago
You can discover your weaknesses yourself by doing problem sets then checking solutions. You'll notice what kinds of questions you keep getting wrong, then you make a note to study that area again or you do more problems in that area. You don't need a computer algorithm for this.
mna_ commented on 500 days of math   gmays.com/500-days-of-mat... · Posted by u/gmays
Notatheist · 17 days ago
I've recently gotten back into math and I'm really struggling with your approach. I find it particularly difficult to get an accurate view of how well I'm doing and where I am. Most concepts I ingest easily, and I demolish any exercises in the books I read, find on the internet, ask AI for, or scribble down myself randomly. I repeat them a couple of times to make sure. All is well. Cute green checkmarks abound. Categories marked as mastered. Pride bordering on arrogance. I move on. A week later I'm handed new concepts. The house of cards collapses. I haven't mastered any of the things. There are gaping holes in the information I was given and I wasn't knowledgeable enough to notice.

The author doesn't seem to share my difficulties either. His are of motivation and those seem to maybe be addressed by the resource he used and specifically sharing his progress with other users. For $50 I expect more than polished KhanAcademy, promises like "accelerates the learning process at 4X the speed of a traditional math class" (if anything I want to slow down), and a progress tracker to post pictures of on X. If I wanted to be told I'm amazing, how long my streak is, and to learn nothing I'd use duolingo.

mna_ · 17 days ago
When do you do exercises, do you refer back to sections in the book or examples? If so, this is a bad habit. Try to do exercises without looking back. This will force you to use your memory. Also don't be too quick to check solutions for things you're stuck on.

Everyone who does mathematics feels the way you do when learning something new. It's a normal feeling. Don't get disheartened. Push through it.

u/mna_

KarmaCake day33August 3, 2025View Original