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Prompted by a discussion at the Recurse Center, here are all the courses I took in undergrad and grad school!

Undergrad transcript

Page: 1 of 1						GRINNELL COLLEGE
December 01 2006

Lindsey A Kuper				0180202		XXXX-XX-XXXX
View gist:9a0fd03673f21873dcd9 [source] $ ghci
GHCi, version 7.8.3: :? for help
Loading package ghc-prim ... linking ... done.
Loading package integer-gmp ... linking ... done.
Loading package base ... linking ... done.
Prelude> :set -XScopedTypeVariables
Prelude> :set -XRankNTypes
Prelude> let x :: (forall a . (a -> a) -> a) = undefined
Prelude> :t x
x :: (a -> a) -> a
View content.js
function hello(name) {
console.log("Hello from privileged code, " + name + "!");
Components.utils.exportFunction(hello, unsafeWindow, {defineAs: "hello"});
View gist:92eaf7d7db11700977a1
// Extension-side code
let AnObj = {
field: "hello",
thisIsATest: function() {
let str = this.field + " world!";
return str;
View gist:29fab36b954acbf56d9c
{-# LANGUAGE DataKinds #-}
{-# LANGUAGE TypeFamilies #-}
import Control.Concurrent (threadDelay)
import Control.LVish
import Control.LVish.DeepFrz
import Control.LVish.Internal (liftIO)
import Data.LVar.IVar
import Data.LVar.Counter
import Data.Word
View bootstrap.js
function myObserver()
myObserver.prototype = {
observe: function(subject, topic, data) {
console.log("observed: " + subject);
View gist:1004f2345aab65d6386c
repos $ mkdir tmp
repos $ cd tmp/
tmp $ cabal sandbox init
Writing a default package environment file to
Creating a new sandbox at /Users/lkuper/repos/tmp/.cabal-sandbox
tmp $ cabal install ~/repos/lvars/haskell/lvish/
Resolving dependencies...
cabal: Could not resolve dependencies:
trying: lvish-2.0 (user goal)
View bootstrap.js
// Code that listens for a custom DOM event. This is how we
// implement communication between unprivileged (web page) and
// privileged (extension) JS code.
function load(win) {
let document = win.document;
document.addEventListener("TestExtensionCustomEvent", function(e) {
win.alert("Hello from privileged code! Event received!");
}, false, true);
lkuper /
Last active Aug 29, 2015
Notes from Peter Alvaro's talk at PWL, August 21, 2014

"Consensus is impossible" is a gloss for "there's always an execution that doesn't terminate".

Once you've internalized that you can't distinguish slow nodes from dead nodes, how do you deal with that?

"When you're engaged in a battle of wits with a Sicilian and death is on the line, you certainly need to think about epistemic logic."

A correct distributed program achieves (nontrivial) distributed property X. So we need to ask:

  1. is X even attainable?
  2. what's the cheapest* protocol that gets me X? (* according to some cost metric)
View gist:5f9e55e8bb72a80a81e5
<lkuper> is it equivalent to say that a function is invertible and that it's a bijection?
<shachaf> Yes.
<lkuper> ok :)
<shachaf> But you have to be careful if you have "functions" between more complicated structures.
<shachaf> In which case there might be more requirements on the inverse. But not with plain old functions.
<lkuper> ah. by ""functions" between more complicated structures", do you mean, like, some other kind of morphism?
<lkuper> (I'm dealing with plain old functions here, but curious)
<shachaf> Right.
<shachaf> E.g. you might care that the inverse of a continuous function is continuous, or something.
<lkuper> I see. so, maybe another way to say this is that, when dealing with sets, it turns out bijectivity and invertibility coincide, but invertibility is a more general concept and applies to fancier kinds of objects too
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