Pith Number

pith:4ZWMHBSB

pith:2016:4ZWMHBSBR2DPK7LIRTXMLBWIV2

not attested not anchored not stored refs pending

Coloring problem of signed interval graphs

F. Ramezani

arxiv:1612.03280 v2 · 2016-12-10 · 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{4ZWMHBSBR2DPK7LIRTXMLBWIV2}

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	2026-05-17T23:40:09.178730Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e66cc386418e86f57d688ceec586c8aead2b9a033a9c943db92b0d12f4e88321

Aliases

arxiv: 1612.03280 · arxiv_version: 1612.03280v2 · doi: 10.48550/arxiv.1612.03280 · pith_short_12: 4ZWMHBSBR2DP · pith_short_16: 4ZWMHBSBR2DPK7LI · pith_short_8: 4ZWMHBSB

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/4ZWMHBSBR2DPK7LIRTXMLBWIV2 \
  | 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: e66cc386418e86f57d688ceec586c8aead2b9a033a9c943db92b0d12f4e88321

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3e3d212675ce271fad5e4028a9ec16ef57e21f46e814159975cc5b730fe127f1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2016-12-10T11:36:26Z",
    "title_canon_sha256": "03aa2c1a5055ef34ab7573043151210120b12b40bc3354b4735d59844382e96d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1612.03280",
    "kind": "arxiv",
    "version": 2
  }
}