Pith Number

pith:QYMQ54TD

pith:2020:QYMQ54TDU7WHHXIL22C4HGDNEJ

not attested not anchored not stored refs pending

Introducing students to research codes: A short course on solving partial differential equations in Python

Pavan Inguva, Pierre J. Walker, Thomas N.H. Cheng, Vijesh J. Bhute

arxiv:2008.10931 v2 · 2020-08-25 · physics.ed-ph · cs.NA · math.NA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QYMQ54TDU7WHHXIL22C4HGDNEJ}

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	2026-07-05T01:30:42.816523Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

86190ef263a7ec73dd0bd685c3986d226e5eb2c4f080c009d229ec783da2394d

Aliases

arxiv: 2008.10931 · arxiv_version: 2008.10931v2 · doi: 10.48550/arxiv.2008.10931 · pith_short_12: QYMQ54TDU7WH · pith_short_16: QYMQ54TDU7WHHXIL · pith_short_8: QYMQ54TD

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/QYMQ54TDU7WHHXIL22C4HGDNEJ \
  | 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: 86190ef263a7ec73dd0bd685c3986d226e5eb2c4f080c009d229ec783da2394d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "15c617294e8aa3574eb3e24012ebcfab6b7b5c672b346aa8ecf820ea88c1a550",
    "cross_cats_sorted": [
      "cs.NA",
      "math.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.ed-ph",
    "submitted_at": "2020-08-25T10:28:58Z",
    "title_canon_sha256": "9573e43a388a1bc7ec0b7c8fd16ada71aec341df0cd2066add178c4da9e018d9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2008.10931",
    "kind": "arxiv",
    "version": 2
  }
}