Pith Number

pith:I7IHJC6F

pith:2019:I7IHJC6FZDVVKBXZXOWSLJLXJB

not attested not anchored not stored refs pending

An application of Cartan's equivalence method to Hirschowitz's conjecture on the formal principle

Jun-Muk Hwang

arxiv:1903.09490 v1 · 2019-03-21 · math.AG · math.CV · math.DG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{I7IHJC6FZDVVKBXZXOWSLJLXJB}

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	2026-05-17T23:50:39.491055Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

47d0748bc5c8eb5506f9bbad25a5774855c8b85c748c89486d5b6459c341fb9d

Aliases

arxiv: 1903.09490 · arxiv_version: 1903.09490v1 · doi: 10.48550/arxiv.1903.09490 · pith_short_12: I7IHJC6FZDVV · pith_short_16: I7IHJC6FZDVVKBXZ · pith_short_8: I7IHJC6F

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/I7IHJC6FZDVVKBXZXOWSLJLXJB \
  | 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: 47d0748bc5c8eb5506f9bbad25a5774855c8b85c748c89486d5b6459c341fb9d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "949b439769b6d0830a54993afeb8dbdf97cc9766af869154184287f274354c21",
    "cross_cats_sorted": [
      "math.CV",
      "math.DG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2019-03-21T02:53:40Z",
    "title_canon_sha256": "4314a7090140e538f28ed26a91adab09e62f4c2e9f77f8c1f8bb988016c98c91"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1903.09490",
    "kind": "arxiv",
    "version": 1
  }
}