Jeff Leader
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Jeff Leader がリツイート
for the present purpose, to ascertain what the schoolmasters of that degenerate age conceived mathematics to be.
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Jeff Leader がリツイート
And we find Boëthius (A.D. 500) defining them as the arts which relate, not to quantity, but to quantities, or quanta. What this would seem to imply is, that mathematics is the foundation of the minutely exact sciences; but really it is not worth our while,
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Jeff Leader がリツイート
Geometry, arithmetic, astronomy, and music were, in the Roman schools of the fifth century and earlier, recognized as the four branches of mathematics.
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Jeff Leader がリツイート
by its peculiar mode and degree of abstractness.Precisely what he conceives this to be it would require me to go too far into the technicalities of his philosophy to explain;and I do not suppose anybody would today regard the details of his opinion as important for mypurpose.
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Jeff Leader がリツイート
Aristotle names, as the subjects of mathematical study, quantity and continuity. But though he never gives a formal definition of mathematics,he makes quite clear, in more than a dozen places,his view that mathematics ought not to be defined by the things which it studies but
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Jeff Leader がリツイート
'I find it unsatisfactory to 'classify' PDEs: this is possible in two variables, but creates the false impression that there is some kind of general and useful classification scheme available in general.' -- Lawrence Evans
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Jeff Leader がリツイート
The affordability crisis isn’t an accident — it’s driven by concentrated corporate power.
Just look at the latest evidence in California's price-fixing case against Amazon.
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Jeff Leader がリツイート
GOP senators losing confidence in Hegseth amid Pentagon turmoil
thehill.com/homenews/senat…
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Thought I'd never solve this one; must have stared at it for 20 minutes & tried various combinations, but I finally solved the Wordle in 4. And how did you do? Wordle #1,773 4/6
⬜🟨⬜🟩⬜
⬜⬜🟩🟩⬜
⬜⬜🟩🟩⬜
🟩🟩🟩🟩🟩
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Jeff Leader がリツイート
Theorem of the Day (April 27, 2026) : The Four-Colour Theorem
Source : Theorem of the Day / Robin Whitty
pdf : theoremoftheday.org/CombinatorialT…
notes : #1" target="_blank" rel="nofollow noopener">theoremoftheday.org/Resources/Theo…
#mathematics #maths #math #theorem
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Jeff Leader がリツイート
School Shooting: There’s nothing we can do about this. Don’t politicize these tragedies.
Political Shooting: We need a $400 million bunker built immediately and you hate America if you don’t agree.
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Jeff Leader がリツイート
FINAL: Rockies 3, Mets 0
WP: Chase Dollander
LP: Kodai Senga
SV: Zach Agnos
📰 The Mets were swept by the Rockies, scoring four runs in the series. They've lost 15 of 17. It isn't good.
📊 Record: 9-19
📉 Streak: L3
🏃♂️ Pace: 52-110
Next: Tuesday vs. WAS, 7:10 p.m. ET
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Jeff Leader がリツイート
Breaking news: The Trump administration provided a lower level of security for the White House correspondents’ dinner than it has for other gatherings of high-ranking officials, according to officials familiar with the plan. wapo.st/4eb1pRg
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Jeff Leader がリツイート
This is nuts.
Sawyer Hackett@SawyerHackett
Spotted in DC: DHS officers (likely detailed to ICE) making traffic stops in DC with duct taped license plates. They are being accompanied by @dcpolicedept. From what I saw, they pulled over a man (who appeared to be Black), made him get out of his car, searched it, then let him go. Unclear whether they wrote him a ticket, but clearly wasn’t undocumented like they hoped. Looked like they were just fishing for arrests. DC taxpayers—who are denied representation federally—are helping fund an authoritarian regime’s “show me your papers” agenda. Pathetic.
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Jeff Leader がリツイート
Jeff Leader がリツイート
Jeff Leader がリツイート
“9-1-1 what’s your emergency?”
“There’s someone in the house. He’s trying to kill me.”
“Okay, what I want you to do is get to your ballroom.”
“I don’t have a ballroom.”
“…Then may God have mercy on your soul.”
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Jeff Leader がリツイート
