Pith Number

pith:VDYFEFFM

pith:2019:VDYFEFFM7C5BRHXXJ4BYQELJCP

not attested not anchored not stored refs pending

On the distance and algorithms of strong product digraphs

Feng Li, Haoran Yin

arxiv:1901.06456 v1 · 2019-01-19 · 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{VDYFEFFM7C5BRHXXJ4BYQELJCP}

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	2026-05-17T23:55:50.261584Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a8f05214acf8ba189ef74f0388116913dfc15864093b1d63e4e7a1f78cbf6c8b

Aliases

arxiv: 1901.06456 · arxiv_version: 1901.06456v1 · doi: 10.48550/arxiv.1901.06456 · pith_short_12: VDYFEFFM7C5B · pith_short_16: VDYFEFFM7C5BRHXX · pith_short_8: VDYFEFFM

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/VDYFEFFM7C5BRHXXJ4BYQELJCP \
  | 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: a8f05214acf8ba189ef74f0388116913dfc15864093b1d63e4e7a1f78cbf6c8b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f915ee96725bca5b414b5e2e570aaac487a0e26113ebc99de351105a2635ba73",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DM",
    "submitted_at": "2019-01-19T02:29:28Z",
    "title_canon_sha256": "1638da15d39298a9c805561d73043b854be530d6ba0d18189132e03eb3398147"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1901.06456",
    "kind": "arxiv",
    "version": 1
  }
}