Yoichi Hirai

Yoichi Hirai

@pirapira.bsky.social

interested in computation and logic.

159 Followers 444 Following 23 Posts Joined Jul 2023
1 week ago

Somebody asked me if I'm back. I said yes!

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1 month ago
YouTube
Julian Sutherland - FRI in ArkLib + Yoichi Hirai - Vibe FRI RBR soundness (February 9th, 2026) YouTube video by Verified zk(E)VM

what we say when we talk about formalizing FRI www.youtube.com/watch?v=tFbT...

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1 month ago
Lean4 formalization of A Lean4 formalization of the paper

I'm helping formal verification of arithmetic circuits (clean) and formalization of cryptography (round-by-round soundness of FRI). I want to connect these with implementations.

round-by-round soundness of FRI: blog.zksecurity.xyz/posts/simple...
clean: blog.zksecurity.xyz/posts/clean/

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1 month ago
Trusted Smart Contracts 2026 Financial Cryptography and Data Security is a major international forum for research, advanced development, education, exploration, and debate regarding information assurance, with a specific focus on...

10th Workshop on Trusted Smart Contracts: late submission is still open: ifca.ai/fc26/wtsc/cf...

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1 month ago
Preview
GitHub - pirapira/reasonable-manifesto: Reasonable Engineering Manifest Reasonable Engineering Manifest. Contribute to pirapira/reasonable-manifesto development by creating an account on GitHub.

3. Part of mathematics is reasonable.
github.com/pirapira/rea...

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1 month ago
Preview
GitHub - pirapira/reasonable-manifesto: Reasonable Engineering Manifest Reasonable Engineering Manifest. Contribute to pirapira/reasonable-manifesto development by creating an account on GitHub.

1.1.1. Reasoning in this manifesto means deductive reasoning. github.com/pirapira/rea...

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2 months ago
ItaLean 2025 & autoformalization of mathematics

yoichihirai.com/b/posts/ital...

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3 months ago
Comparison of formal verification frameworks for arithmetic circuits A hands-on comparison of formal verification frameworks for arithmetic circuits, evaluating those in the ACL2 Book (r1cs, PFCS), acl2-jolt, Garden (Rocq), zk-lean, sp1-lean, and Clean. Each framework ...

I was comparing formal verification frameworks for arithmetic circuits: blog.zksecurity.xyz/posts/formal...

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9 months ago
Evaluating Life Opportunities with Kelly Criterion

yoichihirai.com/b/posts/2025...

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9 months ago

Math is the archetype reasonable system. People are gathering statements = specifications: mathstodon.xyz/@tao/1145865...

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10 months ago
GitHub - pirapira/reasonable-manifesto: Reasonable Engineering Manifest Reasonable Engineering Manifest. Contribute to pirapira/reasonable-manifesto development by creating an account on GitHub.

My reasonable engineering manifesto is still changing. github.com/pirapira/rea...

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10 months ago

sounds like it's getting there.

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10 months ago
Preview
GitHub - pirapira/reasonable-manifesto: Reasonable Engineering Manifest Reasonable Engineering Manifest. Contribute to pirapira/reasonable-manifesto development by creating an account on GitHub.

My reasonable engineering manifesto is getting in shape. I'll edit it a bit more. github.com/pirapira/rea...

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11 months ago
Preview
GitHub - pirapira/reasonable-manifesto: Reasonable Manifest Reasonable Manifest. Contribute to pirapira/reasonable-manifesto development by creating an account on GitHub.

I started writing reasonable manifesto for systems that can be reasoned about github.com/pirapira/rea...

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1 year ago

Once getting QED is automated, the bottleneck is me wanting statements to be proven. I will want statements proven about things with short specifications: the reasonable systems.

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1 year ago

ping

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2 years ago

I ignored navigation apps and found a nice ride.

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2 years ago

If something is described as avocado green, how are you supposed to know if that means outside or inside?

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2 years ago

何が大事かなあ。

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2 years ago

You can get bedsheets made with RFC printed on it

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2 years ago

「朝のドラめもん」くらい安定した質のものを毎日書いて何十年にもわたって公表するのは、よいなと思う。公表の媒体も、テキストだけのHTMLを自分のWebサーバに置くだけで、長期的に維持するのに向いていてよいなと思う。

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2 years ago

I'm making up a technical term called reasonable systems. A reasonable system can be reasoned about with theorem provers, SMT solvers, model checkers or such. The behavior of a reasonable system can be described with a relatively small amount of logical formulas.

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2 years ago

Ein Tipp gegen die Hitze: Nutze den südlichen Gehweg. Dieser liegt öfter im Schatten.

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2 years ago

昨日わざわざ北側の日が当たる歩道を使ってる人もいっぱい見た(ドイツ)。

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2 years ago

oi!

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