Show HN: Bertrand Russell's Principia Mathematica in Lean
13 by ndrwnaguib | 3 comments on Hacker News.
This project aims to formalize the first volume of Prof. Bertrand Russell’s Principia Mathematica using the Lean theorem prover. Throughout the formalization, I tried to rigorously follow Prof. Russell’s proof, with no or little added statements from my side, which were only necessary for the formalization but not the logical argument. Should you notice any inaccuracy (even if it does not necessarily falsify the proof), please let me know as I would like to proceed with the same spirit of rigour. Before starting this project, I had already found Prof. Elkind’s formalization of the Principia using Rocq (formerly Coq), which is much mature work than this one. However, I still thought it would be fun to do it using Lean4.
13 by ndrwnaguib | 3 comments on Hacker News.
This project aims to formalize the first volume of Prof. Bertrand Russell’s Principia Mathematica using the Lean theorem prover. Throughout the formalization, I tried to rigorously follow Prof. Russell’s proof, with no or little added statements from my side, which were only necessary for the formalization but not the logical argument. Should you notice any inaccuracy (even if it does not necessarily falsify the proof), please let me know as I would like to proceed with the same spirit of rigour. Before starting this project, I had already found Prof. Elkind’s formalization of the Principia using Rocq (formerly Coq), which is much mature work than this one. However, I still thought it would be fun to do it using Lean4.
Gym Class (YC W22) Is Hiring Character Animation Engineering Lead
1 by hackerews | 0 comments on Hacker News.
1 by hackerews | 0 comments on Hacker News.
Show HN: I used OpenAI's new image API for a personalized coloring book service
4 by darajava | 0 comments on Hacker News.
I've had an idea for a long time to generate a cute coloring book based on family photos, send it to a printing service, and then deliver it to people. Last month, when OpenAI's Sora was released for public use I (foolishly) thought I'd manually drag-and-drop each order’s photos into Sora's UI and copy the resulting images back into my system. This took way too much time (about an hour for each of the few books I made and tested with family and friends). It clearly wasn't possible to release this version because I’d be losing a huge amount of time on every order. So instead, I decided I'd finish off the project as best I could, put it "on ice," and wait for the API release. The API is now released (quicker than I thought it'd be, too!) and I integrated it last night. I'd love your feedback on any and all aspects. The market is mostly family-based, but from my testing of the physical book I've found that both adults and kids enjoy coloring them in (it's surprisingly cathartic and creative). If you would like to order one you can get 10% off by tapping the total price line item five times.
4 by darajava | 0 comments on Hacker News.
I've had an idea for a long time to generate a cute coloring book based on family photos, send it to a printing service, and then deliver it to people. Last month, when OpenAI's Sora was released for public use I (foolishly) thought I'd manually drag-and-drop each order’s photos into Sora's UI and copy the resulting images back into my system. This took way too much time (about an hour for each of the few books I made and tested with family and friends). It clearly wasn't possible to release this version because I’d be losing a huge amount of time on every order. So instead, I decided I'd finish off the project as best I could, put it "on ice," and wait for the API release. The API is now released (quicker than I thought it'd be, too!) and I integrated it last night. I'd love your feedback on any and all aspects. The market is mostly family-based, but from my testing of the physical book I've found that both adults and kids enjoy coloring them in (it's surprisingly cathartic and creative). If you would like to order one you can get 10% off by tapping the total price line item five times.
Show HN: A modern spreadsheet with Python integration
11 by jpiech | 0 comments on Hacker News.
Process large (e.g. 4GB+) data sets in a spreadsheet. Load GB/32 million-row files in seconds and use them without any crashes using up to about 500GB RAM. Load/edit in-place/split/merge/clean CSV/text files with up to 32 million rows and 1 million columns. Use your Python functions as UDF formulas that can return to GS-Calc images and entire CSV files. Use a set of statistical pivot data functions. Solver functions virtually without limits for the number of variables. Create and display all popular chart types with millions of data points instantly. Suggestions for improvements are welcome (and often implemented quite quickly).
11 by jpiech | 0 comments on Hacker News.
Process large (e.g. 4GB+) data sets in a spreadsheet. Load GB/32 million-row files in seconds and use them without any crashes using up to about 500GB RAM. Load/edit in-place/split/merge/clean CSV/text files with up to 32 million rows and 1 million columns. Use your Python functions as UDF formulas that can return to GS-Calc images and entire CSV files. Use a set of statistical pivot data functions. Solver functions virtually without limits for the number of variables. Create and display all popular chart types with millions of data points instantly. Suggestions for improvements are welcome (and often implemented quite quickly).
I Designed My LED Matrix PCB with Code Instead of Traditional EDA Tools
4 by imrishabh18 | 1 comments on Hacker News.
4 by imrishabh18 | 1 comments on Hacker News.
Wikipedia's nonprofit status threatened by DC U.S. Attorney Ed Martin
26 by coloneltcb | 11 comments on Hacker News.
26 by coloneltcb | 11 comments on Hacker News.
Simons Foundation Launches Collaboration on Ecological Neuroscience
9 by domofutu | 0 comments on Hacker News.
9 by domofutu | 0 comments on Hacker News.
ACM's flagship magazine seeks submissions by/for practitioners
3 by underscoreF | 0 comments on Hacker News.
3 by underscoreF | 0 comments on Hacker News.
Your phone isn't secretly listening to you, but the truth is more disturbing
8 by zeech | 0 comments on Hacker News.
8 by zeech | 0 comments on Hacker News.
I wrote a book called "Crap Towns". It seemed funny at the time
20 by url | 2 comments on Hacker News.
20 by url | 2 comments on Hacker News.