====== 2023-07-31 ======
  * obsidian? 

===== Obsidian =====
I saw some of my classmates using it, and I would like to give a try, say 30 min. 

  * https://obsidian.md/download , download
  * ok, need to create a 'vault' (ok, cool name, folder, box, repository...). should I do a remote one? let's see how expensive is that. Google says, it is 10 USD / month. forget it, I will just store it in icloud, right?
  * the interface looks really like vscode. 
  * I created a file called hello world. ok, md. so what? what's good about it?
  * I created another note, ok, you can create link in there, link to previous notes. ok, so what? I can do that here in dokuwiki as well. 
  * there is a side button, that create a note, with today's date. wonderful.
  * there is a thing called 'canvas', which basically allows you create 'diagrams of relations', big deal. 
  * well, dokuwiki only differ from that, because there is no relation diagrams. But, that's not hard to create, just a directed diagram. any little database would do. 
  * the naming convention, the flat structure, is just like wikipedia, so what? 

ok, 20 minutes is up. I am not missing anything. goodbye. oh, let's see latex. works. 

copy paste picture? works. 

nah, still not good enough. 

===== google colab?  =====