Pith Number

pith:U2RWI7GX

pith:2013:U2RWI7GXGKSYPYVUH4DSFI6OU5

not attested not anchored not stored refs pending

MirrorShard: Proof by Computational Reflection with Verified Hints

Adam Chlipala, Edward Z. Yang, Gregory Malecha, Patrick Hulin, Thomas Braibant

arxiv:1305.6543 v1 · 2013-05-28 · cs.PL · cs.LO

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{U2RWI7GXGKSYPYVUH4DSFI6OU5}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T03:24:40.485989Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a6a3647cd732a587e2b43f0722a3cea7552ebbb56d8cb955fb587f7739f3e66b

Aliases

arxiv: 1305.6543 · arxiv_version: 1305.6543v1 · doi: 10.48550/arxiv.1305.6543 · pith_short_12: U2RWI7GXGKSY · pith_short_16: U2RWI7GXGKSYPYVU · pith_short_8: U2RWI7GX

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/U2RWI7GXGKSYPYVUH4DSFI6OU5 \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: a6a3647cd732a587e2b43f0722a3cea7552ebbb56d8cb955fb587f7739f3e66b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a618b9d4b7b2b41705df2f8f68b34da034cb911ad1ee9d9cfc0c0c5fc30cc425",
    "cross_cats_sorted": [
      "cs.LO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.PL",
    "submitted_at": "2013-05-28T15:50:10Z",
    "title_canon_sha256": "c110183c74b0195b6f755f87b562a01a1ead74db4ef806e050b0d3a69c161c8b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1305.6543",
    "kind": "arxiv",
    "version": 1
  }
}