Pith Number

pith:PS44I2FS

pith:2017:PS44I2FS6HVJC4OZJ764X2L6PX

not attested not anchored not stored refs pending

On singularity formation in a Hele-Shaw model

Huy Nguyen, Peter Constantin, Tarek Elgindi, Vlad Vicol

arxiv:1708.08490 v1 · 2017-08-28 · 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{PS44I2FS6HVJC4OZJ764X2L6PX}

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	2026-05-18T00:05:00.429515Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7cb9c468b2f1ea9171d94ffdcbe97e7dd330c901e390786bf1224abe083541c2

Aliases

arxiv: 1708.08490 · arxiv_version: 1708.08490v1 · doi: 10.48550/arxiv.1708.08490 · pith_short_12: PS44I2FS6HVJ · pith_short_16: PS44I2FS6HVJC4OZ · pith_short_8: PS44I2FS

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/PS44I2FS6HVJC4OZJ764X2L6PX \
  | 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: 7cb9c468b2f1ea9171d94ffdcbe97e7dd330c901e390786bf1224abe083541c2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b7682e5a084aecfdcff29a79dceb2ae645216cad82eaed76b42f2bc4cb3fdb1e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2017-08-28T19:17:33Z",
    "title_canon_sha256": "c9addf70254851a386f2adff43c87f14cece50745b39fe7acb5159584bd0d55b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1708.08490",
    "kind": "arxiv",
    "version": 1
  }
}