Pith Number

pith:EV4TAXHP

pith:2010:EV4TAXHP4JC4SSQBGYUGXGCMYD

not attested not anchored not stored refs pending

Almost Series-Parallel graphs: structure and colorability

Elad Aigner-Horev

arxiv:1012.5799 v1 · 2010-12-28 · math.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{EV4TAXHP4JC4SSQBGYUGXGCMYD}

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	2026-05-18T04:32:21.492041Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2579305cefe245c94a0136286b984cc0df8104ac6e55c8b5cda115ab972abd11

Aliases

arxiv: 1012.5799 · arxiv_version: 1012.5799v1 · doi: 10.48550/arxiv.1012.5799 · pith_short_12: EV4TAXHP4JC4 · pith_short_16: EV4TAXHP4JC4SSQB · pith_short_8: EV4TAXHP

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/EV4TAXHP4JC4SSQBGYUGXGCMYD \
  | 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: 2579305cefe245c94a0136286b984cc0df8104ac6e55c8b5cda115ab972abd11

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bfd35e969e1d3b1d2d697ce00e963cf33f5a678762f826df369950f97e143ddc",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2010-12-28T17:25:31Z",
    "title_canon_sha256": "9268df3079d8c5959aacbe040e348a34bf041e22fea13804948e5e60e3382013"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1012.5799",
    "kind": "arxiv",
    "version": 1
  }
}