Pith Number

pith:PW7OBP7S

pith:2017:PW7OBP7SNH6VVZUGU7K7HGVR5U

not attested not anchored not stored refs pending

Open problem on $\sigma$-invariant

Kinkar Ch. Das, Seyed Ahmad Mojallal

arxiv:1711.06906 v2 · 2017-11-18 · 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{PW7OBP7SNH6VVZUGU7K7HGVR5U}

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	2026-05-18T00:19:56.745549Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7dbee0bff269fd5ae686a7d5f39ab1ed2d74c0365d63e9f350061d959206369a

Aliases

arxiv: 1711.06906 · arxiv_version: 1711.06906v2 · doi: 10.48550/arxiv.1711.06906 · pith_short_12: PW7OBP7SNH6V · pith_short_16: PW7OBP7SNH6VVZUG · pith_short_8: PW7OBP7S

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/PW7OBP7SNH6VVZUGU7K7HGVR5U \
  | 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: 7dbee0bff269fd5ae686a7d5f39ab1ed2d74c0365d63e9f350061d959206369a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "55b79a713f1b52737b0af153211a6603c26907c9f0ecdb5fbf8a2b2ab27b81a8",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2017-11-18T18:08:06Z",
    "title_canon_sha256": "5ca7c678f2b1c4d6586b6c5780c58a60a7cb9962f4c6f068167b628ed76bf870"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1711.06906",
    "kind": "arxiv",
    "version": 2
  }
}