Richard Penner
Arpie4Math@mathstodon.xyz
<p>SW Engineer, Amateur mathematician (contributed to metamath.org, oeis.org, ...), Legal Tourist (went to Honolulu in 2010 to watch the end of Sancho v. DOE).</p>
Posts
-
View post
#Beatty v. #Trump (25-cv-04480, District Court, D.C.) #Lawsuit over the #KennedyCenter capture, renaming, and closure. 2026/03/14 > The Court will therefore order that Beatty receive certain information and documents in advance of the meeting, to the extent they exist. It further orders that Beatty be afforded a meaningful opportunity to lodge her dissent at the meeting and not be categorically barred from speaking. 2026/05/29 > Congress gave the Kennedy Center its name, and only Cong...
-
View post
@elebertus@eigenmagic.net @kajer@infosec.exchange There’s a TLD for my ForTran art?
-
View post
New: The Donald J. Trump Revocable Trust v. Capital One, N.A. (25-cv-21596) District Court, S.D. Florida https://www.courtlistener.com/docket/69853458/the-donald-j-trump-revocable-trust-v-capital-one-na/ 2013-2017 DOJ ran "Operation Choke Point" using informal pressure on banks to sever ties ("de-banking") with high-risk-for-fraud businesses like payday lenders, firearm dealers, and pornographic film producers. 2021/01/06 #Trump holds #Jan6 rally 2021/01/20 Trump leaves of...
-
View post
Cantor&#39;s claim is that the infinity of the set real numbers, |ℝ|, is larger than the infinity of the set of counting numbers, |ℕ|. If Cantor is wrong, then there must be a function 𝑓:ℕ⟶ℝ such that the set of real numbers, ℝ, is exactly the same as the image of all natural numbers under function 𝑓, 𝑓(ℕ) = { 𝑓(1), 𝑓(2), 𝑓(3), ... }. If Cantor is right, then there is no such function, 𝑓 where 𝑓(ℕ) = ℝ. Cantor&#39;s diagonal argument is, at its heart, a proof that a set of size 2^n is s...
-
View post
@pzmyers@freethought.online California law prohibits operating a motor vehicle while using a car microscope. At least, I think it does. The California Legislature website went down while I was researching this claim.
-
View post
Take a set, 𝑥. Is it finite or infinite? Well what definition do you use? ① ∃𝑦 ∈ ω₀ 𝑥 ≈ 𝑦 ; There is a natural number, 𝑦, such that you may may map 𝑦 one-to-one onto the set 𝑥, enumerating each of its members. So 𝑥 is finite for the same reason { 1, 2, 3 } is finite. ② ¬ ∃𝑧 ∈ (On ∖ ω₀) 𝑥 ≈ 𝑧 ; There is no such infinite ordinal, 𝑧, such that you may map 𝑧 one-to-one onto the set 𝑥. So 𝑥 is finite because ω₀, the smallest infinite ordinal, cannot be mapped 1-to-1 into it. Do ① and ② say the sam...
-
View post
Begriffsschrift (1879), is one of the first manuscripts on #SymbolicLogic. As such, it literally invents a new language to describe the subjects the author, #GottlobFrege, wants to introduce. And this notation is very unlike what we see in math before or after this. So I will list some theorems adapted (by me, circa 2020) from #Frege with proper set-theoretical bounds. #SetTheory #Logic #Metamath
-
View post
@ZachWeinersmith So many thousands of tickets filed with the header “no kings” — scrum meeting is going to go sideways if I can’t at least narrow down the categories of issues to a specific place to address the widely seen problem.
-
View post
@cstross @fazalmajid @scotlit @bookstodon Now I have the image of Dick Van Dyke reprising his take on a Cockney accent, portraying Bob in Death of a Unicorn, in a cut-and-paste of Equoid material that never saw the clearance department , solely because the director needed to pad out the runtime… I think now I have to watch it, now. Please read Equoid, because all evidence points to them being as different from each other as they are from the unicorns of Gravity Falls’ “The Last Mablecorn.”