GregBuchholz

9 ms·

31.
by GregBuchholz 9y ago
Seconded. I've only just started it, but it really resonates with me so far. It is about how to better use time / avoid distraction.
32.
by GregBuchholz 9y ago
>I suggest teaching vectors before trig. You can get the cosine and sine from the dot and cross products. What about geometric algebra instead? http://www.shapeoperator.com/2016/12/12/sunset-geometry/
33.
by GregBuchholz 9y ago
Your mention of deliberate practice prompted me reinvestigate the guy who was doing the 10,000 hours of deliberate practice to become a golf pro. Unfortunately, from what I can tell, he did get to 10,000 hours, but it doesn't seem lik
34.
by GregBuchholz 9y ago
Anyone have a comparison to the "Code the Matrix" book and lectures? http://codingthematrix.com/ https://cs.brown.edu/video/channels/coding-matrix-fall-2014/
35.
Breakdown of the Will(picoeconomics.org)
2 points by GregBuchholz 9y ago|0 comments
36.
by GregBuchholz 9y ago
Thanks. I'll start looking into algebraic geometry and abstract algebra. https://www.amazon.com/Algebraic-Scientists-Engineers-Mathem... https://www.amazon.com/Book-Abstract-Algebra-Second-Mathemat...
37.
by GregBuchholz 9y ago
In reading the author's other article, "Cross Product Considered Harmful", and I bet he would be interested in section 1.3 (starting on page 13) of the book "An Introduction to Complex Analysis for Engineers" by Mic
38.
by GregBuchholz 9y ago
Anyone have recommendations for learning about mechanical linkages (books/MOOC/other)? Recently I've been intrigued by things like straight line linkages: https://en.wikipedia.org/wiki/Peaucellier%E2%80%
39.
by GregBuchholz 9y ago
Got to love this quote from the "Einstein Problem" page on Wikipedia: https://en.wikipedia.org/wiki/Einstein_problem "Depending on the particular definitions of nonperiodicity and the specifications of w
40.
by GregBuchholz 9y ago
>If the tile is allowed to tile the plane both periodically and non-periodically, the solution would be obvious. Maybe you can draw a sketch for those of us who aren't immediately seeing the obvious?
41.
by GregBuchholz 9y ago
When it came to the description of "einsteins" (a single tile aperiodic tessellation), I couldn't help but think of the images in the 3rd edition of The Scheme Programming Language: http://www.scheme.com/tspl3
42.
by GregBuchholz 9y ago
Yes, and next I'd love to see big parentheses: ⎛if ⎛> (+ a b)⎞ ⎛case x ⎞ ⎛cond ⎞⎞ ⎜ ⎝ (- c d)⎠ ⎜ (1 'foo)⎟ ⎜ ((> y 2) 'quux) ⎟⎟ ⎜ ⎜ (2 'bar)⎟ ⎝ (t &#x2
43.
by GregBuchholz 9y ago
You might like: https://www.coursera.org/learn/learning-how-to-learn
44.
by GregBuchholz 9y ago
Anyone have recommendations on: "How to Fold It: The Mathematics of Linkages, Origami, and Polyhedra" by Joseph O'Rourke? http://howtofoldit.org/
45.
by GregBuchholz 9y ago
Better yet, read the book Zeilberger mentions at the beginning of his essay: "The Mathematical Experience" by Phillip J. Davis, and Reuben Hersh http://isbn.nu/9780395929681 ...which is a great book, composed of a
46.
by GregBuchholz 9y ago
>Constructive mathematicians believe the reals exists. I think when people mention the "reals" they are usually referring to the uncountable reals, which you can't construct, compute, name, or know: https://arxi
47.
by GregBuchholz 9y ago
Robert Yates wrote an interesting book that I liked about a plethora of non-compass-and-straight-edge trisection methods: The Trisection Problem. https://www.google.com/#q=the+trisection+problem+yates
48.
Restructor: Automatically refactors code-bases to their least-redundant form(strlen.com)
2 points by GregBuchholz 9y ago|0 comments
49.
by GregBuchholz 9y ago
In "'(1. . #\#)" the "1." is a number. You are correct that you don't need digits after the decimal point. And #\# is just the pound character. `(1 ,2) is a proper list, and `(1 ,@2) is an improper list. Yo
50.
by GregBuchholz 9y ago
1) Improper list, or a cons cell. Quote and dotted pair notation are pretty common "in the wild". http://download.plt-scheme.org/doc/html/guide/Pairs__Lists__... 2) Yup, complex number. 3) Another
51.
by GregBuchholz 9y ago
That's all one expression, and there are 5 argument to the list procedure: 1.) a list containing three numbers, a symbol, and a character, 2.) a complex number, 3.) a string, 4.) the symbol "NIL", 5.) the empty vector.
52.
by GregBuchholz 9y ago
Well, Scheme has a bunch of syntax as well. (list '(1. . #\#) -5/6+7.s-8i `(1 ,@2) 1@1 ;hmmm, no unquote splicing comma ;-) 10# ;surprised? (list #i+1 +1i
53.
by GregBuchholz 9y ago
>(<function or macro name> arg1 arg2 ...) >That's it. This is 100% of the syntax. (list '(1 . (#x-A 2.3 |(+ foo bar)| #|4|# #\#)) (1+ '#C(-5/6 +7.s-8)) "(* 9 10)" () #())
54.
by GregBuchholz 9y ago
>We need documentation bounties, or something. ...Are there write ups exploring what "or something" could possibly be? Like futures contracts or options or potentially other risk mitigation practices from the financial world?
55.
by GregBuchholz 9y ago
Robert Yates wrote a book exploring approximations like this and other means of trisection (graduated ruler, linkages, etc.). https://www.google.com/#q=the+trisection+problem+yates
56.
by GregBuchholz 9y ago
Has anyone explored the computational nature of Newtonian gravity? That is, if you carefully setup a set of masses in some manner, and let them interact though their gravitational pull, what kinds of things can you compute? Is gravity Tur
57.
by GregBuchholz 9y ago
Here's an older visualization for other interesting planar n-body choreographies: http://www.maths.manchester.ac.uk/~jm/Choreographies/ ...plus a link to the animations for the linked paper: http:/&#x2F
58.
by GregBuchholz 9y ago
Anyone recommend a good pop-sci book on deep hole boring? Seems like it could be an interesting light engineering read.
59.
by GregBuchholz 9y ago
What about the west coast volcanoes in North America? https://en.wikipedia.org/wiki/List_of_Cascade_volcanoes ...how deep do you have to go to get to the 400C temperature level on some of those volcanoes??
60.
by GregBuchholz 9y ago
>Well costs are ~quadratic in depth. Anyone know as to why this is the case? At first pass it seems like your cutting tools should wear out in proportion to depth. But I suppose as things get warmer tool wear becomes faster. What type

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