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John Scott started the topic November 24: Principia Talk 13: Proposition 1 in the forum 2024 Principia Series 7 months, 1 week ago
I’ll cover Proposition 1 which helps establish the area rule.
Meeting link: https://meet.google.com/wgc-jaqo-zmb
Model website: https://sciencehike.com -
John Scott started the topic November 17: Principia Talk 12: Definitions and Laws in the forum 2024 Principia Series 7 months, 2 weeks ago
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John Scott started the topic November 10: Principia Talk 11: Lemma 7 in the forum 2024 Principia Series 7 months, 3 weeks ago
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John Scott replied to the topic Meeting Updates in the forum 2024 Principia Series 8 months ago
During Sunday’s talk on Nov 3, I’ll ask participants to use my website again. Please plan to attend in such a way that you can both participate in the video call and interact with my site. For example, you might have a window for each, or you might have a second device for my website.
Thanks.
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John Scott replied to the topic October 27: Principia Talk 9: Lemmas 2, 3, 4 in the forum 2024 Principia Series 8 months ago
To document some of the feedback regarding the site:
- The site lacks a certificate.
- The handle for adjusting panel spacing is easy to miss.
- The monotonic restriction for lemmas 2 and 3 can be mistaken as computer sluggishness.
In addition, I know lemma 4 needs to be redone.
I welcome further feedback.
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John Scott started the topic November 3: Principia Talk 10: Lemma 6 in the forum 2024 Principia Series 8 months ago
The meeting link remains https://meet.google.com/wgc-jaqo-zmb.
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Mike Witt changed their profile picture 8 months, 1 week ago
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John Scott started the topic October 27: Principia Talk 9: Lemmas 2, 3, 4 in the forum 2024 Principia Series 8 months, 1 week ago
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John Scott started the topic Principia math talks start October 20 in the forum Announcements 8 months, 2 weeks ago
Sunday I’ll begin examining some of the math that Newton covers in his Principia.
The start time and link are the same as before…
Start time: 4pm Mountain, 3pm Pacific.
Link: https://meet.google.com/wgc-jaqo-zmb
If you’d like to join, try to enter the virtual lobby a few minutes ahead of time, and wait for me to let everyone in on the hour. That…[Read more] -
John Scott started the topic October 20: Principia Talk 8: Lemma 1 in the forum 2024 Principia Series 8 months, 2 weeks ago
I will begin examining the contents of Newton’s Principia, starting with Lemma 1.
In modern terms, Lemma 1 is about limits and convergence. -
John Scott started the topic October 13: Principia Talk 7: History (part 7) in the forum 2024 Principia Series 8 months, 3 weeks ago
This talk will cover the emergence of a scientific community in London and Paris, and the tremendous progress in both astronomy and mechanics between Descartes and Newton.
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John Scott started the topic October 6: Principia Talk 6: History (part 6) in the forum 2024 Principia Series 9 months ago
I will wrap up Galileo’s Two New Sciences and talk a bit about Descartes.
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John Scott started the topic September 29: Principia Talk 5: History (part 5) in the forum 2024 Principia Series 9 months, 1 week ago
Placeholder for talk 5
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Mike Witt replied to the topic September 22: Principia Talk 4: History (part 4) in the forum 2024 Principia Series 9 months, 2 weeks ago
I think it might be a good idea to always post the link (we had to scrounge around for it last time).
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John Scott replied to the topic September 15: Principia Talk 3: History (part 3) in the forum 2024 Principia Series 9 months, 2 weeks ago
After Stefan’s question about Kepler being excommunicated, I went back to re-read this section from my book on Kepler. I reproduced several pages here for anyone interested. [from Voelkel’s Johannes Kepler and the New Astronomy]
When Kepler arrived in Linz in May 1612, he was emotionally exhausted. The splendid intellectual society in the…[Read more]
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John Scott started the topic September 22: Principia Talk 4: History (part 4) in the forum 2024 Principia Series 9 months, 2 weeks ago
I’ll continue with what happens after Kepler’s Epitome of Copernican Astronomy.
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John Scott replied to the topic September 8: Principia Talk 2: History (part 2) in the forum 2024 Principia Series 9 months, 3 weeks ago
Stefan asked a question which I wished I had an answer for about how Kepler determined planetary distances in Cosmographic Mystery. (His 3rd “Law” would relate distances to orbital periods, but he didn’t have that principle yet.) It’s possible that the answer can be gleaned from the outlines for the class I took on this subject. Even if not, some…[Read more]
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John Scott started the topic September 15: Principia Talk 3: History (part 3) in the forum 2024 Principia Series 9 months, 3 weeks ago
I’ll resume discussion of Kepler writing the manuscript of Astronomia Nova.
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Tina Gilbertson replied to the topic Meeting Updates in the forum 2024 Principia Series 9 months, 4 weeks ago
Looking forward to it!
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John Scott started the topic Principia Talks resume September 8 in the forum Announcements 10 months ago
Happy long weekend everyone!
I’ve recovered and I plan to resume talks Sunday September 8. If you have questions or comments, we have a new forum thread where you can post them: https://physicscafe.org/topic/meeting-updates/
We plan to post meeting updates there, so it would be a good thread to subscribe to should any further changes come up. - Load More
