Pith Number

pith:IDSYDG6U

pith:2022:IDSYDG6U5JK2YT3TLTVRCHNLME

not attested not anchored not stored refs pending

A higher speed type II blow-up for the 4-d Fujita equation

Jianfeng Zhao

arxiv:2209.08580 v2 · 2022-09-18 · 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{IDSYDG6U5JK2YT3TLTVRCHNLME}

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	2026-07-05T05:00:17.960465Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

40e5819bd4ea55ac4f735ceb111dab613dbbb27624a4b90bfebac376fd219613

Aliases

arxiv: 2209.08580 · arxiv_version: 2209.08580v2 · doi: 10.48550/arxiv.2209.08580 · pith_short_12: IDSYDG6U5JK2 · pith_short_16: IDSYDG6U5JK2YT3T · pith_short_8: IDSYDG6U

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/IDSYDG6U5JK2YT3TLTVRCHNLME \
  | 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: 40e5819bd4ea55ac4f735ceb111dab613dbbb27624a4b90bfebac376fd219613

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6a99121bfd792a2bc90b837dcbf5f7c83d12851d19ab484dc583736e94703e4c",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2022-09-18T15:06:26Z",
    "title_canon_sha256": "5ab817c7d8639061b3aa0123fae8b1670ff13969b862dfaf986847ca63b7782f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2209.08580",
    "kind": "arxiv",
    "version": 2
  }
}