Pith Number

pith:4EYQKFJ5

pith:2019:4EYQKFJ55RYGF3Y7JIGQHT4FPE

not attested not anchored not stored refs pending

Continuation beyond interior gradient blow-up in a semilinear parabolic equation

Johannes Lankeit, Marek Fila

arxiv:1902.01127 v1 · 2019-02-04 · 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{4EYQKFJ55RYGF3Y7JIGQHT4FPE}

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	2026-05-17T23:54:49.593820Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e13105153dec7062ef1f4a0d03cf8579238e807875ba730f280c33f3a5a0e31e

Aliases

arxiv: 1902.01127 · arxiv_version: 1902.01127v1 · doi: 10.48550/arxiv.1902.01127 · pith_short_12: 4EYQKFJ55RYG · pith_short_16: 4EYQKFJ55RYGF3Y7 · pith_short_8: 4EYQKFJ5

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/4EYQKFJ55RYGF3Y7JIGQHT4FPE \
  | 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: e13105153dec7062ef1f4a0d03cf8579238e807875ba730f280c33f3a5a0e31e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8bd8d12c6c61ee6d8ca886608021c46d992d0f92db177b29c3fc23943e846b5a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2019-02-04T11:22:24Z",
    "title_canon_sha256": "4a79923d4ac73a0a78e5e1917254af4db014b0a010603c6878490c074c5ea80a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.01127",
    "kind": "arxiv",
    "version": 1
  }
}