Pith Number

pith:IJEQ7WOE

pith:2017:IJEQ7WOEWRTUPHFQE6XAMRZTVY

not attested not anchored not stored refs pending

Coloring cross-intersecting families

Danila Cherkashin

arxiv:1707.04539 v1 · 2017-07-14 · 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{IJEQ7WOEWRTUPHFQE6XAMRZTVY}

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	2026-05-18T00:40:17.799824Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

42490fd9c4b467479cb027ae064733ae2b27a6f3b04a025695ce450cfacdb517

Aliases

arxiv: 1707.04539 · arxiv_version: 1707.04539v1 · doi: 10.48550/arxiv.1707.04539 · pith_short_12: IJEQ7WOEWRTU · pith_short_16: IJEQ7WOEWRTUPHFQ · pith_short_8: IJEQ7WOE

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/IJEQ7WOEWRTUPHFQE6XAMRZTVY \
  | 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: 42490fd9c4b467479cb027ae064733ae2b27a6f3b04a025695ce450cfacdb517

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "101858b86449c9ad6bd914c96d1aa1de30e2e6dcfc30e3bbdbf7587faf40376a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2017-07-14T15:26:20Z",
    "title_canon_sha256": "019530af2ec835b726f1ef8e3344a2e66ff11e1fbe4395ab5bc2000b778da7e4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1707.04539",
    "kind": "arxiv",
    "version": 1
  }
}