graycat

62 ms·

1. 361.▲
   by graycat 3y ago

   AGI? Hmm. That's artificial general intelligence ? Do insects count? In a plastic box on my kitchen countertop were some potatoes that had been there too long. So, I started to see little black flies. Soon with a hose on a vacuum,
2. 362.▲
   by graycat 3y ago

   What kind of trees on what land with what climate? Why was that land without trees? Logging? Too much wind? Too little water?
3. 363.▲
   by graycat 3y ago

   (1) Common K-12 math. (2) A text on set theory, especially axiomatic set theory. (3) Abstract algebra, i.e., the natural numbers, the rationals, the reals, the complex numbers, the basic properties, and some on groups, rings, fields, and
4. 364.▲
   by graycat 3y ago

   > How to self study pure math ... Did a lot of that, before, during, and/or after formal courses, and the results were good. In one case, in a subject I'd carefully studied on my own, I was required to take a course given by th
5. 365.▲
   by graycat 3y ago

   Thanks! Uh, in this thread here at Hacker News we were, uh, considering, uh, "user interface"???? Yup!
6. 366.▲
   by graycat 3y ago

   To me, now, the Hacker News user interface has become one of the best on the Web!
7. 367.▲
   by graycat 3y ago

   Along these lines, recently happened to see at the Web site "Big Red Car" https://themusingsofthebigredcar.com/returns-driving-retail/... Edit: Somehow this URL leads to some spot on the Web page of the URL
8. 368.▲
   by graycat 3y ago

   (1) What seem to be relatively small efforts, knowledge, etc. can yield big results. (2) Think. Continually try to understand what is going on that has any real chance of affecting you. (3) Get an education, at least a good education at th
9. 369.▲
   by graycat 3y ago

   This post is aimed at the lawyers and judges in the current DoJ/Google legal case. From this case, I'm concerned, apparently threatened: (A) I have some expertise in computing, worked in and with computing for decades, written som
10. 370.▲
    by graycat 3y ago

    There is some significant food culture in the US: (1) In grad school, the little town had lots of pizza shops with booths good for student couples! One of our profs was from Italy, and we asked him which was better, US pizza or Italian p
11. 371.▲
    by graycat 3y ago

    Net, I lost money working at IBM. Cost of living, especially from commuting about 100 miles a day, was just too darned high.
12. 372.▲
    by graycat 3y ago

    (1) Going Extinct: In the US and likely in all the developed countries, on average the number of children per woman is less than 2. Soooo, in those countries we are going extinct. Or, the population is shrinking. Right, this simple fa
13. 373.▲
    by graycat 3y ago

    Own favorite way to understand matrix multiplication: For any positive integer n, and any n x n matrix A of real and/or complex numbers, there are n x n matrices U and H so that A = UH Each of U and H consists of real and/or com
14. 374.▲
    by graycat 3y ago

    "Editing"? My most important computing application is KEdit, a terrific text editor. Mobile? Since it seemed like highly inferior computing, I delayed getting one. Finally I did. Tried to do some little thing, and for four hour
15. 375.▲
    by graycat 3y ago

    > This requires chunky copper and clamps. Yup. But that engineering issue is the responsibility of the designers of the DC/AC converter "box"!!! > Then you have the issue of protecting the 120V loads. You can get more
16. 376.▲
    by graycat 3y ago

    Thanks for the alternator current of 100 Amperes and 1200 Watts -- I didn't have that data! If I run the battery down, then I'll just have to wait until the electric utility restores the power! Then I'll have to recharge the
17. 377.▲
    by graycat 3y ago

    When our electric power went out 2 months ago, I started thinking about emergency power. Our outage was unusually long, 2 days, because lightening hit a tree which fell on our overhead power lines to the house and pulled down all the lines
18. 378.▲
    by graycat 3y ago

    Uh, let me think ...! Uh, first, I'll assume that "IoT" abbreviates Internet of Things . ===>>> IoTs? Okay what things , IoTs, are being considered? (a) I have some computers that run Windows. These computers are
19. 379.▲
    by graycat 3y ago

    Correction: The last URL was supposed to be https://www.youtube.com/watch?v=NXHj8jy0cfY
20. 380.▲
    by graycat 3y ago

    Since don't have a Spotify account, can't try the program! But you mentioned Taylor Swift!!! With good makeup, clothes, lighting, expression, and photography, she's, we just have to admit, as they say, "drop dead gorgeo
21. 381.▲
    by graycat 3y ago

    Sorry! I LOVE measure theory and find it much better and especially EASIER than traditional Riemann integration!!! In simplest terms, do the partitioning on the Y-axis (the range of the function being integrated) instead of the X-axis (t
22. 382.▲
    by graycat 3y ago

    The OP (original post) describes what we might call problems, issues, or challenges in US formal, academic education, say, K through 4 year college. Here is a theme of a rough solution, necessarily "rough" if only because US educ
23. 383.▲
    by graycat 3y ago

    I lived in Ohio from 1980 to 1985 and NYS until 2020. There was lots of cold weather and snow. Waiting until the snow melted was fine advice, quite reasonable.
24. 384.▲
    by graycat 3y ago

    Deleted.
25. 385.▲
    by graycat 3y ago

    (1) Uh, just to mention, while sometimes some norms of math writing are not always made fully clear, in writing with math expressions it is important at least to define the symbols and also good to define the terms, motivate the discussion,
26. 386.▲
    by graycat 3y ago

    WWII? The atom bombs on Japan? I tried to understand the history, causes, read the Richard Rhodes books, other books, watched documentaries and movies, etc. As I read this thread, I guess that it has more and better thinking about the iss
27. 387.▲
    by graycat 3y ago

    For the software to schedule the fleet at FedEx, I wrote in PL/I on CP/67 (control program, i.e., virtual machine, for the IBM 360/67, with virtual memory) CMS (conversational monitor system, the user interface) on a 360&#x2F
28. 388.▲
    by graycat 3y ago

    To be meaningful, half-life needs a Markov assumption, i.e., that the past and future are conditionally independent given the present. Or, more simply, at each instant , forget the past and for predicting the future use only the present
29. 389.▲
    by graycat 3y ago

    The I. N. Herstein text does Galois theory with fully precise proofs. Learn those and could see how to "invent" Galois theory yourself. As I recall Herstein does not cover Gröbner basis. By now don't really have to look for
30. 390.▲
    by graycat 3y ago

    Early calculus in 60 seconds: Consider a car with a speedometer that says how fast are moving and an odometer that says how far have gone. Given the data from the odometer can find what the speedometer values were. That is the first half