Pith Number

pith:HPME2B22

pith:2019:HPME2B227XEJCIX7ZW62TM6ZZA

not attested not anchored not stored refs pending

Enumeration of Preferred Extensions in Almost Oriented Digraphs

Ray Li, Serge Gaspers

arxiv:1907.01006 v1 · 2019-07-01 · cs.DS · cs.DM · 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{HPME2B227XEJCIX7ZW62TM6ZZA}

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	2026-05-17T23:41:41.474036Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3bd84d075afdc89122ffcdbda9b3d9c8000810259eb48076947366eafa4baaab

Aliases

arxiv: 1907.01006 · arxiv_version: 1907.01006v1 · doi: 10.48550/arxiv.1907.01006 · pith_short_12: HPME2B227XEJ · pith_short_16: HPME2B227XEJCIX7 · pith_short_8: HPME2B22

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/HPME2B227XEJCIX7ZW62TM6ZZA \
  | 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: 3bd84d075afdc89122ffcdbda9b3d9c8000810259eb48076947366eafa4baaab

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f19c60ae78e767460bfcb164eb628d55d9f9a215e0131babaf15a9f37f63652f",
    "cross_cats_sorted": [
      "cs.DM",
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2019-07-01T18:25:57Z",
    "title_canon_sha256": "173ba17bf96b89efd1f448b89e219d3bdfd727f862da6016c428e8964c55b5a7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1907.01006",
    "kind": "arxiv",
    "version": 1
  }
}