Pith Number

pith:5JKPDCQ2

pith:2019:5JKPDCQ26YEL2GTENA6BUYQAUE

not attested not anchored not stored refs pending

Fluid Modeling and Boolean Algebra for Arbitrarily Complex Topology in Two Dimensions

Qinghai Zhang, Zhixuan Li

arxiv:1902.06378 v1 · 2019-02-18 · math.AT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{5JKPDCQ26YEL2GTENA6BUYQAUE}

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	2026-05-17T23:53:45.715362Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ea54f18a1af608bd1a64683c1a6200a1009d5ffab4eed38e12169383da89a8dd

Aliases

arxiv: 1902.06378 · arxiv_version: 1902.06378v1 · doi: 10.48550/arxiv.1902.06378 · pith_short_12: 5JKPDCQ26YEL · pith_short_16: 5JKPDCQ26YEL2GTE · pith_short_8: 5JKPDCQ2

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/5JKPDCQ26YEL2GTENA6BUYQAUE \
  | 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: ea54f18a1af608bd1a64683c1a6200a1009d5ffab4eed38e12169383da89a8dd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f2ddc22b32906e3221b32f3e7fc7e0f42bc1df76ffe30a1ec1ccbe580f84fbe2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2019-02-18T02:16:25Z",
    "title_canon_sha256": "988179a09260494aaa368acc4a85053901d21f5073a43978d0477135bf12a385"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.06378",
    "kind": "arxiv",
    "version": 1
  }
}