Pith Number

pith:DG7EFLON

pith:2013:DG7EFLONRNLLSS5MA6VCLBIZ4B

not attested not anchored not stored refs pending

On the question of diameter bounds in Ricci flow

Qi S Zhang

arxiv:1307.2729 v3 · 2013-07-10 · math.DG · math.AP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{DG7EFLONRNLLSS5MA6VCLBIZ4B}

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	2026-05-18T03:13:45.397049Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

19be42adcd8b56b94bac07aa258519e04556d694967805c90594de08347c3d13

Aliases

arxiv: 1307.2729 · arxiv_version: 1307.2729v3 · doi: 10.48550/arxiv.1307.2729 · pith_short_12: DG7EFLONRNLL · pith_short_16: DG7EFLONRNLLSS5M · pith_short_8: DG7EFLON

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/DG7EFLONRNLLSS5MA6VCLBIZ4B \
  | 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: 19be42adcd8b56b94bac07aa258519e04556d694967805c90594de08347c3d13

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1baf862e9c07b5afa4714704773da68fae706ec4fb75979c1e7acb59589cb781",
    "cross_cats_sorted": [
      "math.AP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2013-07-10T09:41:05Z",
    "title_canon_sha256": "d600db1a7435b91cd1703df17f0b872f1a1550322b20268401e33e7fd5af6951"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1307.2729",
    "kind": "arxiv",
    "version": 3
  }
}