Pith Number

pith:3MGARWEO

pith:2019:3MGARWEOQTGJ5YVURM5UBWVWPQ

not attested not anchored not stored refs pending

Cohomology of the universal smooth cubic surface

Ronno Das

arxiv:1902.00737 v2 · 2019-02-02 · math.AG · math.GT · math.NT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{3MGARWEOQTGJ5YVURM5UBWVWPQ}

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	2026-05-17T23:53:49.401974Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

db0c08d88e84cc9ee2b48b3b40dab67c368b5039a130c4fcae60f59474535698

Aliases

arxiv: 1902.00737 · arxiv_version: 1902.00737v2 · doi: 10.48550/arxiv.1902.00737 · pith_short_12: 3MGARWEOQTGJ · pith_short_16: 3MGARWEOQTGJ5YVU · pith_short_8: 3MGARWEO

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/3MGARWEOQTGJ5YVURM5UBWVWPQ \
  | 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: db0c08d88e84cc9ee2b48b3b40dab67c368b5039a130c4fcae60f59474535698

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0e1def245acea7751f5385bb149fc69586dfb5755dd9e2495c5dd0427320ca20",
    "cross_cats_sorted": [
      "math.GT",
      "math.NT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2019-02-02T15:41:13Z",
    "title_canon_sha256": "3ed214b70057a5a0ec513ad12a74753e0a5bab8bf6c8ea53ae34e559ee2016b6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.00737",
    "kind": "arxiv",
    "version": 2
  }
}