1,228 Photos and videos
Pinned Tweet
24 Jun 2021
It's that time again:
Collected Problems 5 is done: bit.ly/2nTb9su
Collected Problems 6 is starting: bit.ly/3d8vL6k
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18 Nov 2023
It's mostly codifying my current behavior but I'm done here.
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15 Sep 2023
For @DavidKButlerUoA - spoilers in the reply
15 Sep 2023
(1-x)²=x³(1-1/4 x)
1-2x x²=x³-1/4 x⁴
1/4 x⁴-x³ x²-2x 1=0
x⁴-4x³ 4x²-8x 4=0
Not feeling good about that at all!
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15 Sep 2023
If you suspect that the whole triangle is a 45-45-90 (which does turn out to be true) that also gives some test Polynomials you can divide out and see if there is a remainder.
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15 Sep 2023
But my original remark was whether this could be avoided without assuming similarity of the triangles so carry on
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15 Aug 2023
Apropos of nothing in particular: My model of learning is that more knowledge/instruction can never hurt and usually helps. I need solid evidence and some sort of working thesis to change my mind.
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17 Jul 2023
blog.mathoffthegrid.com/2019…
I also went back. To this problem a few years back and blogged about it.
I tend to work in small spurts in the evening rather than one long block.
17 Jul 2023
From time to time I have posted videos on YouTube of myself solving maths problems in real time. Here are some more, with the difference that they are six videos all devoted to the same problem, with a total length of around five hours. 1/
youtube.com/watch?v=fl4xw829…
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8 Jul 2023
That echoes my impression this morning . There was the most activity to look at after breakfast than I've seen yet.
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Benjamin Leis retweeted
19 Jun 2023
Two Pifagor theorems for blue triangles solve this problem.
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Benjamin Leis retweeted
12 Jun 2023
This is a theorem of Niven, and the answer is yes
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11 Jun 2023
Puzzle I came up with based on a riff on a recent ARML problem.
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7 May 2023
Formulas are useful for reducing computational load when doing the same calculation but they also make it easier to extend the learning. If you continually have to go back to first principles for everything, you rarely can move beyond.
6 May 2023
Math teachers: I’d love opinions on this.
I didn’t teach my kids an explicit formula for permutations or combinations this year. We used logic to find the solutions and looked for patterns.
Should I being showing them the explicit formulas? #mtbos #iteachmath
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7 May 2023
But I also find deriving the formulas has its own intrinsic value in terms of understanding.
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8 Apr 2023
You apparently can't reply to this post due to the substack link. Anyway highly recommended. Hopefully @JDHamkins adds a mastodon presence
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7 Apr 2023
Lacking a printer, I need to find out a way to have someone do this for me.
7 Apr 2023
The 3d printing options on the new einstein are getting pretty awesome
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5 Apr 2023
In light of the continued weirdness here: I'm also on mastodon @benleis@mathstodon.xyz . This is a great time to try it out.
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