Pith Number

pith:PFA6I33Y

pith:2011:PFA6I33YRP2FY3DCP4GVCEC2DR

not attested not anchored not stored refs pending

New Hardness Results in Rainbow Connectivity

Meghana Nasre, Prabhanjan Ananth

arxiv:1104.2074 v1 · 2011-04-11 · cs.CC · 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{PFA6I33YRP2FY3DCP4GVCEC2DR}

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	2026-05-18T04:24:35.929756Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7941e46f788bf45c6c627f0d51105a1c68ba07e81d3d1fcc6baf66e9c4c79e18

Aliases

arxiv: 1104.2074 · arxiv_version: 1104.2074v1 · doi: 10.48550/arxiv.1104.2074 · pith_short_12: PFA6I33YRP2F · pith_short_16: PFA6I33YRP2FY3DC · pith_short_8: PFA6I33Y

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/PFA6I33YRP2FY3DCP4GVCEC2DR \
  | 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: 7941e46f788bf45c6c627f0d51105a1c68ba07e81d3d1fcc6baf66e9c4c79e18

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e5ca3d89961d24548e64acd99c88da942aad010b4a77997c38ee5806f4a36b33",
    "cross_cats_sorted": [
      "cs.DM",
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CC",
    "submitted_at": "2011-04-11T21:55:17Z",
    "title_canon_sha256": "1b3b7ee50f10910ded43998ca93b4bdaaac3893254d4a4508316fb568c3ea1d7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1104.2074",
    "kind": "arxiv",
    "version": 1
  }
}