hajoscher

## liquid.md

      
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                hajoscher
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              June 21, 2023 13:52
            
              
                Liquidity Pool
              
          
    How to Derive the Constant Product Formula for Liquidity Pools

The basic formula for liquidity pools
$$x  y = k$$
is well-known.  But how to derive it?
TLDR


## rotate_mp4.py
#! /usr/bin/env python3
import sys
import mmap

if len(sys.argv) < 2 :
	print("""
change rotation metadata in mp4 files
see: https://superuser.com/a/1307206/1010278
usage: %s file.mp4 0-3
	#! /usr/bin/env python3
	import sys
	import mmap

	if len(sys.argv) < 2 :
	print("""
	change rotation metadata in mp4 files
	see: https://superuser.com/a/1307206/1010278
	usage: %s file.mp4 0-3