Andrew Critch
PhD, UC Berkeley
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    • Papers
    • Software
    • Selected talks
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  • Blog
    • Jekyll posts (2018-present)
    • WordPress posts (2014-2018)
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      • Effectiveness
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    • LessWrong posts (2010-2012)
  • Videos
  • Math
    • Robust Rental Harmony
    • PDTAI : Provability, Decision Theory and Artificial Intelligence
    • SAGS at Berkeley: Student Algebraic Geometry Seminar
    • MPHD at Berkeley: Math, Productivity, Happiness & Decision-making
    • AIM 2011 Singular Learning Theory slides
    • BASS: Berkeley Algebraic Statistics Seminar
    • MathOverflow
    • Random Math
  • Teaching
    • My teaching history
    • My (ancient) Math 53 course page
    • How to lose marks on math exams
  • Rationality
    • TEDx talk on “Aversion Factoring”
    • Using yEd for causal diagramming
    • MPHD at Berkeley: Math, Productivity, Happiness & Decision-making
    • The Center for Applied Rationality
    • SPARC: Summer Program on Applied Rationality and Cognition
    • The Credence Game
      • Overview of the game
      • Credence Game screenshots
      • Information scoring – a first look at information theory
    • Causality Lab exercises
    • Rationality as a social movement
  • Contact

MathOverflow

I am a proud and early adopter of MathOverflow.net … user number 9 in order of sign-up 🙂

My top answers:
Why are flat morphisms flat?
Why do groups and abelian groups feel so different?
What is a section?
What is an intuitive view of adjoints?
Why is it a good idea to study a ring by studying its modules?

Questions I want better answers for:
Is being torsion a local property of module elements?
What does primary decomposition of modules mean geometrically?

My user page displays a complete list of questions and answers I’ve contributed.

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  • Home
  • Research
    ▼
    • Papers
    • Software
    • Selected talks
    • Activities
  • Blog
    ▼
    • Jekyll posts (2018-present)
    • WordPress posts (2014-2018)
      ▼
      • Life
      • AI Safety
      • Effectiveness
      • Altruism
    • LessWrong posts (2010-2012)
  • Videos
  • Math
    ▼
    • Robust Rental Harmony
    • PDTAI : Provability, Decision Theory and Artificial Intelligence
    • SAGS at Berkeley: Student Algebraic Geometry Seminar
    • MPHD at Berkeley: Math, Productivity, Happiness & Decision-making
    • AIM 2011 Singular Learning Theory slides
    • BASS: Berkeley Algebraic Statistics Seminar
    • MathOverflow
    • Random Math
  • Teaching
    ▼
    • My teaching history
    • My (ancient) Math 53 course page
    • How to lose marks on math exams
  • Rationality
    ▼
    • TEDx talk on “Aversion Factoring”
    • Using yEd for causal diagramming
    • MPHD at Berkeley: Math, Productivity, Happiness & Decision-making
    • The Center for Applied Rationality
    • SPARC: Summer Program on Applied Rationality and Cognition
    • The Credence Game
      ▼
      • Overview of the game
      • Credence Game screenshots
      • Information scoring – a first look at information theory
    • Causality Lab exercises
    • Rationality as a social movement
  • Contact