Pith Number

pith:7L2NY2GQ

pith:2022:7L2NY2GQVUPXT6CZO7Y7WBY6ZS

not attested not anchored not stored refs pending

On the Homomorphism Order of Oriented Paths and Trees

Jan Hubi\v{c}ka, Jaroslav Ne\v{s}et\v{r}il, Oriol Serra, Pablo Oviedo

arxiv:2201.09365 v2 · 2022-01-23 · math.CO · cs.DM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7L2NY2GQVUPXT6CZO7Y7WBY6ZS}

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	2026-07-05T03:51:13.225918Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

faf4dc68d0ad1f79f85977f1fb071ecc8f4de0de0874357878d7a671520156a8

Aliases

arxiv: 2201.09365 · arxiv_version: 2201.09365v2 · doi: 10.48550/arxiv.2201.09365 · pith_short_12: 7L2NY2GQVUPX · pith_short_16: 7L2NY2GQVUPXT6CZ · pith_short_8: 7L2NY2GQ

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/7L2NY2GQVUPXT6CZO7Y7WBY6ZS \
  | 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: faf4dc68d0ad1f79f85977f1fb071ecc8f4de0de0874357878d7a671520156a8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "55ee075640a78f952f6b398a0a32b849a8ffc4dc67af58db79900ea8234c5a16",
    "cross_cats_sorted": [
      "cs.DM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2022-01-23T21:02:10Z",
    "title_canon_sha256": "57ad805d66d6df1d35eda851ceb8e155ff36da5a827fd2de06876deac18ebc51"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2201.09365",
    "kind": "arxiv",
    "version": 2
  }
}