Pith Number

pith:MRBDVPEX

pith:2015:MRBDVPEXKX6XVVKDRHACCB6E3I

not attested not anchored not stored refs pending

A Reduced Upper Bound for an Edge-coloring Problem from Relation Algebra

David A. Andrews, Jeremy F. Alm

arxiv:1504.07290 v1 · 2015-04-27 · math.CO · math.LO · math.RA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{MRBDVPEXKX6XVVKDRHACCB6E3I}

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	2026-05-18T02:17:35.296014Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

64423abc9755fd7ad54389c02107c4da154a54114c2e8586b769bb4eaf931e05

Aliases

arxiv: 1504.07290 · arxiv_version: 1504.07290v1 · doi: 10.48550/arxiv.1504.07290 · pith_short_12: MRBDVPEXKX6X · pith_short_16: MRBDVPEXKX6XVVKD · pith_short_8: MRBDVPEX

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/MRBDVPEXKX6XVVKDRHACCB6E3I \
  | 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: 64423abc9755fd7ad54389c02107c4da154a54114c2e8586b769bb4eaf931e05

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3ee16228d6153d1f97aa8acb2adff1f1566ca2fc4fa4f1cefdd145d9ff72a09f",
    "cross_cats_sorted": [
      "math.LO",
      "math.RA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2015-04-27T22:20:14Z",
    "title_canon_sha256": "4b19fdf4a4e534d5acc650e7a1fe32a0f277c4b2ad81c07cee9eae4358521094"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1504.07290",
    "kind": "arxiv",
    "version": 1
  }
}