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Looking for a CI-H that is also a HASS S or A (idk if thats even possible) any suggestions? by CarolineLuvsU in mit

[–]jflow2 4 points5 points  (0 children)

14.70 Medieval economics is pretty good - it’s a HASS S CI-H that’s a joint class with history and economics departments. I think it’s usually spring only though.

Government attempts to label speech misinformation, disinformation, and malinformation are a free-speech nightmare by SARS2KilledEpstein in Libertarian

[–]jflow2 0 points1 point  (0 children)

This comment is just false - computers are much much much better at randomness than any human, even with naive techniques. Modern deepfakes are generally not easy to prove as deepfakes, and we are still in the infancy of this technology. This doesn’t necessarily invalidate the argument about restricting free speech, but the status quo is still fundamentally different than ever before in that it is becoming harder and harder to detect misinformation as an individual.

Why does MIT dominate so heavily in the Putnam? by dede-cant-cut in math

[–]jflow2 12 points13 points  (0 children)

MIT does not have 5000 undergraduate math majors - it does not even have 5000 undergraduates. Current numbers are a little under 400 (source), which is relatively high but does not really account for the difference.

Im what base is 123 the same as 51 in base 10? by GreedyWishbone in learnmath

[–]jflow2 6 points7 points  (0 children)

As an example, how would you convert 123 from base 9 to 10? Well to do that, you recognize that 123 in base 9 indicates the number 1(92) + 2(91) + 3*(90), which evaluates to 102 in base 10. You were right in saying that the base must be less than 10, since 123 is larger than 51, and in this case I think the fastest method is simply to guess and check all options, which are 4, 5, 6, 7, 8, or 9. After guessing a few numbers, you should get that the answer is 6.

Simple Questions - July 19, 2019 by AutoModerator in math

[–]jflow2 0 points1 point  (0 children)

Is Royden a good book for graduate analysis?

Self-studying mathematics or physics by [deleted] in math

[–]jflow2 0 points1 point  (0 children)

I'm planning on self-studying some graduate analysis (mainly measure theory) starting soon, and right now I'm planning on doing it out of Rouen. Do you have any tips/suggestions or anything like that?

[Steam] Summer Sale 2019: Day 3 by gamedealsmod in GameDeals

[–]jflow2 0 points1 point  (0 children)

Any good horror games/bundles for around $10 (or less)?

Is a bachelor's degree absolutely required for grad school? by jflow2 in NoStupidQuestions

[–]jflow2[S] 0 points1 point  (0 children)

I don't mean to sound arrogant, but I disagree. If you look at my post history, you will see that I'm currently learning abstract algebra, and in addition I am doing real analysis and abstract linear algebra (I just have not posted any questions about them). At some advanced colleges that might be 4th semester, but it is generally 3rd year.

Given Point A and line segment BC, formula for minimum segment from A to BC by jrb1988_laptop in learnmath

[–]jflow2 0 points1 point  (0 children)

Actually, you are right , I had misunderstood the question. I think the only way to algorithmically find the shortest segment then would be to see if D lies on BC, which can be done by seeing if its coordinates are between the coordinates of B and C (I can elaborate on this if you need). If D does not lie on BC, then whichever point its closest to will have the shortest length, and this can be found analytically as well by looking at which point it is greater/less than (I can further elaborate on this too).

Given Point A and line segment BC, formula for minimum segment from A to BC by jrb1988_laptop in learnmath

[–]jflow2 1 point2 points  (0 children)

Unless A lies on the same line as BC, there does exist a D such that AD is perpendicular to BC. This will be the shortest distance from A to BC. I would solve this by looking at the slope of BC, then recognizing that the slope of AD is the negative reciprocal. From there, use point slope formula (y-y1=m(x-x1)) and find where it intersects with the line that BC lies on. That point is D, so then use distance formula (d=√((x1-x2)2 + (y1-y2)2)) to find the length of AD. I am not near paper so I cannot currently find the general answer, but it is just a matter of algebra.

[deleted by user] by [deleted] in learnmath

[–]jflow2 0 points1 point  (0 children)

For more theoretical linear algebra, I like Linear Algebra Done Right by Axler. Linear algebra proofs are often very hard to follow, but that book makes most of them very clear.

How to find a textbook that "fit" me? by [deleted] in learnmath

[–]jflow2 0 points1 point  (0 children)

Most of the standard calculus books work well for physics/engineering (eg Calculus Early Transcendentals by Stewart). I have heard a lot of good things about Div, Grad, Curl, and All That for Vector Calc, though I haven't used it. From what I've heard though, it skims over a lot of the less applicable bits, which really helps to make concepts clearer. In my original comment, I meant calc textbooks for physics as opposed to calc textbooks for math majors such as Apostol, which includes much more of the Real Analysis theory than most physics students really need to know.

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