Pith Number

pith:HSNRT3H7

pith:2018:HSNRT3H7JM6I7B7P6MQ5IHXRV6

not attested not anchored not stored refs pending

Can One Escape Red Chains? Regular Path Queries Determinacy is Undecidable

Grzegorz G{\l}uch, Jerzy Marcinkowski, Piotr Ostropolski-Nalewaja

arxiv:1802.01554 v1 · 2018-02-05 · cs.DB

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HSNRT3H7JM6I7B7P6MQ5IHXRV6}

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	2026-05-18T00:24:25.586826Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3c9b19ecff4b3c8f87eff321d41ef1af884593a969a38f71232019d1ae1bd732

Aliases

arxiv: 1802.01554 · arxiv_version: 1802.01554v1 · doi: 10.48550/arxiv.1802.01554 · pith_short_12: HSNRT3H7JM6I · pith_short_16: HSNRT3H7JM6I7B7P · pith_short_8: HSNRT3H7

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/HSNRT3H7JM6I7B7P6MQ5IHXRV6 \
  | 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: 3c9b19ecff4b3c8f87eff321d41ef1af884593a969a38f71232019d1ae1bd732

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5b9f488850e73505342a10170909cc8766b9d23d681065420387b6cab777fc19",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DB",
    "submitted_at": "2018-02-05T18:33:16Z",
    "title_canon_sha256": "61b5be23938a0b5ea256d026fb249fcad32010834bdc24ec9e1aeaf51346797a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1802.01554",
    "kind": "arxiv",
    "version": 1
  }
}