Der kurz vor der COP16 zur Biodiversität veröffentlichte Living Planet Index zeigt das Ausmaß des Biodiversitätsverlusts in den vergangenen 50 Jahren, auch wenn an den dabei angewendeten statistischen Verfahren starke Zweifel bestehen. Die Wirbeltier-Populationen haben nach diesem Index um 73% abgenommen, am stärksten in Lateinamerika und der Karibik. Die wichtigste Ursache ist die veränderte Landnutzung. https://www.theguardian.com/environment/2024/oct/10/collapsing-wildlife-populations-points-no-return-living-planet-report-wwf-zsl-warns

https://imgur.com/a/typit-info-4FfSjwI

https://new.reddit.com/r/typewriters/comments/pjhe2g/typeits_for_manually_typing_mathematical_symbols/

How does one concretely define "inside" and "outside"? This definition is part of the missing space between the intuition and the mathematical proof.

reply to u/AndreSanch at https://www.reddit.com/r/Zettelkasten/comments/158gy35/im_using_latex_to_create_my_zettel_notes/

This sort of thing has certainly been done before by many. Be careful of going overboard.

If you don't already have a list of most of the common LaTeX math symbols, here's a good starter list, but make sure that your assigned meaning to them from an argumentation perspective is either "standard" or you've written it down for later use/memory. (There's nothing worse than a 10 year old note whose symbols you no longer remember.)

If you haven't done a course in philosophy or logic (something along the lines of Elements of Logic), then that may also help you in terms of many of the common uses/meanings, though there are a variety of meanings to various symbols through time, so take care.

Scribes and scholars over time have used a variety of symbols and annotations to mean various things, some of which were standardized in various contexts. For more on this take a look at some of Evina Stein's work and research on historic texts. Some of this might include:

Steinová, Evina. “Nota and Require. The Oldest Western Annotation Symbols and Their Dissemination in the Early Middle Ages.” Scribes and the Presentation of Texts (from Antiquity to c. 1550). Proceedings of the 20th Colloquium of the Comité International de Paléographie Latine, 2021, 473–89. https://doi.org/10.1484/M.BIB-EB.5.124987.<br /> ———. Notam Superponere Studui: The Use of Annotation Symbols in the Early Middle Ages. Brepols, 2019.<br /> Steinova, Evina. “Technical Signs in Early Medieval Manuscripts Copied in Irish Minuscule.” In The Annotated Book in the Early Middle Ages: Practices of Reading and Writing, edited by M. J. Teeuwen and I. Van Renswoude, 37–85. Brepols, 2017.

For those interested in scratching the surface of some possibilities and history, I might recommend:

Scheinerman, Edward R. Mathematical Notation: A Guide for Engineers and Scientists. CreateSpace, 2011.

Your note about Forte, while cute and clever doesn't necessarily mean that he's an old man, however, so take care about your propositions and what you draw from them or else your system won't hold up for long.

http://www.cube20.org/

God's number is 20. Proven by Tomas Rokicki, Herbert Kociemba, Morley Davidson, and John Dethridge

AMS Open Math Notes

Resources and inspiration for math instruction and learning

Welcome to AMS Open Math Notes, a repository of freely downloadable mathematical works hosted by the American Mathematical Society as a service to researchers, faculty and students. Open Math Notes includes: - Draft works including course notes, textbooks, and research expositions. These have not been published elsewhere and are subject to revision. - Items previously published in the Journal of Inquiry-Based Learning in Mathematics, a refereed journal - Refereed publications at the AMS

Visitors are encouraged to download and use any of these materials as teaching and research aids, and to send constructive comments and suggestions to the authors.

An Introduction to Proofs and the Mathematical Vernacular<br /> by Martin Day

I've experienced and seen this myself.

One of the problems in approaching quantum gravity is the choice for how to best represent it mathematically. Most of quantum mechanics is algebraic in nature but gravity has a geometry component which is important. (restatement)

This is similar to the early 20th century problem of how to best represent quantum mechanics: as differential equations or using group theory/Lie algebras?

This prompts the question: what other potential representations might also work?

Could it be better understood/represented using Algebraic geometry or algebraic topology as perspectives?

[handwritten notes from 2023-02-02]

Homework problems are pedagogical devices and many (most) authors place them in the text near where they would be profitably be done. They also provide a useful break in the text to prompt more novice students to actually perform them at the end of a section.

More advanced students, however, should have caught on eventually at the need to work out examples for themselves which are presented in a textbook, but they should also be seeking out additional problems where ever they appear in the text, not to mention seeing out any outside additional problems, making up their own, and exploring any additional questions these pose.

In mathematics textbooks this working of problems, expanding on them and seeking out new ones is often a large part of what is lurking behind the sometimes nebulous sounding idea of "mathematical sophistication". The rest of that equation typically includes experience with the various methods and means of proofs and some basic background in logic.

"death march of proposition, lemma, proof"

This is a bit harsh n'cest pas?

This is a reference to a great book "Beginning Mathematical Logic: A Study Guide [18 Feb 2022]" by Peter Smith on "Teach Yourself Logic A Study Guide (and other Book Notes)". The document itself is called "LogicStudyGuide.pdf".

It focuses on mathematical logic and can be a gateway into understanding Gödel's incompleteness theorems.

I found this some time ago when looking for a way to grasp the difference between first-order and second-order logics. I recall enjoying his style of writing and his commentary on the books he refers to. Both recollections still remain true after rereading some of it.

It both serves as an intro to and recommended reading list for the following: - classical logics - first- & second-order - modal logics - model theory<br /> - non-classical logics - intuitionistic - relevant - free - plural - arithmetic, computability, and incompleteness - set theory (naïve and less naïve) - proof theory - algebras for logic - Boolean - Heyting/pseudo-Boolean - higher-order logics - type theory - homotopy type theory

Weiss, D. J., & Shanteau, J. (2021). The futility of decision making research. Studies in History and Philosophy of Science Part A, 90, 10–14. https://doi.org/10.1016/j.shpsa.2021.08.018

Shematologist, MD on Twitter: “How it started. How it’s going. Https://t.co/il5DWFm11W” / Twitter. (n.d.). Retrieved October 10, 2021, from https://twitter.com/acweyand/status/1442304094945873922

Impact of Social Sciences. “How Models Change the World – and What We Should Do about It,” August 20, 2021. https://blogs.lse.ac.uk/impactofsocialsciences/2021/08/20/how-models-change-the-world-and-what-we-should-do-about-it/.

Wang, B., Gou, M., Guo, Y., Tanaka, G., & Han, Y. (2020). Network structure-based interventions on spatial spread of epidemics in metapopulation networks. Physical Review E, 102(6), 062306. https://doi.org/10.1103/PhysRevE.102.062306

🔥 Kareem Carr 🔥 on Twitter. (n.d.). Twitter. Retrieved 1 May 2021, from https://twitter.com/kareem_carr/status/1383925269132582912

Holme, Petter, and Jari Saramäki. ‘Temporal Networks as a Modeling Framework’. ArXiv:2103.13586 [Physics], 24 March 2021. http://arxiv.org/abs/2103.13586.

Ryan, W., Baum, S., & Evers, E. (2021). People Behave as if they Anticipate Regret Conditional on Experiencing a Bad Outcome. PsyArXiv. https://doi.org/10.31234/osf.io/dcgpy

Health Nerd. (2021, February 1). The story continues—After @ikashnitsky and I pointed out that this paper was mathematically impossible, and had numerous errors, it was partially corrected Now, the lead author is calling us ‘trolls’ [Tweet]. @GidMK. https://twitter.com/GidMK/status/1356085063998267398

Kucharski, A. J., Klepac, P., Conlan, A. J. K., Kissler, S. M., Tang, M. L., Fry, H., Gog, J. R., Edmunds, W. J., Emery, J. C., Medley, G., Munday, J. D., Russell, T. W., Leclerc, Q. J., Diamond, C., Procter, S. R., Gimma, A., Sun, F. Y., Gibbs, H. P., Rosello, A., … Simons, D. (2020). Effectiveness of isolation, testing, contact tracing, and physical distancing on reducing transmission of SARS-CoV-2 in different settings: A mathematical modelling study. The Lancet Infectious Diseases, 0(0). https://doi.org/10.1016/S1473-3099(20)30457-6

Velásquez, N., Leahy, R., Restrepo, N. J., Lupu, Y., Sear, R., Gabriel, N., Jha, O., Goldberg, B., & Johnson, N. F. (2020). Hate multiverse spreads malicious COVID-19 content online beyond individual platform control. ArXiv:2004.00673 [Nlin, Physics:Physics]. http://arxiv.org/abs/2004.00673