Pith Number

pith:3NDQIAVL

pith:2022:3NDQIAVLCMIWK4VZIKYAXCOCJ3

not attested not anchored not stored refs pending

Spread approximations for forbidden intersections problems

Andrey Kupavskii, Dmitriy Zakharov

arxiv:2203.13379 v3 · 2022-03-24 · 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{3NDQIAVLCMIWK4VZIKYAXCOCJ3}

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.

Cited by

1 paper in Pith

Delta-system method: a survey

Receipt and verification

First computed	2026-07-05T08:03:04.678613Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

db470402ab13116572b942b00b89c24eedc132b8a8d783874dfe9222c6cd322a

Aliases

arxiv: 2203.13379 · arxiv_version: 2203.13379v3 · doi: 10.48550/arxiv.2203.13379 · pith_short_12: 3NDQIAVLCMIW · pith_short_16: 3NDQIAVLCMIWK4VZ · pith_short_8: 3NDQIAVL

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/3NDQIAVLCMIWK4VZIKYAXCOCJ3 \
  | 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: db470402ab13116572b942b00b89c24eedc132b8a8d783874dfe9222c6cd322a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a0dd3846108ebe9d1322afcabd54c19a4914de17aa7a1aabbafd95db5914e716",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2022-03-24T23:00:36Z",
    "title_canon_sha256": "a909780ecfb7ed74a85b7a0aa6b929df86c495b8c7398b0ee6104afb450c2806"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2203.13379",
    "kind": "arxiv",
    "version": 3
  }
}