Pith Number

pith:M72EKRU3

pith:2019:M72EKRU3DDTJPVVBGLHSCG3T6S

not attested not anchored not stored refs pending

QRATPre+: Effective QBF Preprocessing via Strong Redundancy Properties

Florian Lonsing, Uwe Egly

arxiv:1904.12927 v2 · 2019-04-29 · cs.LO

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

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	2026-05-17T23:41:42.243689Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

67f445469b18e697d6a132cf211b73f4a4041c4de369f031b418b44b3e99f559

Aliases

arxiv: 1904.12927 · arxiv_version: 1904.12927v2 · doi: 10.48550/arxiv.1904.12927 · pith_short_12: M72EKRU3DDTJ · pith_short_16: M72EKRU3DDTJPVVB · pith_short_8: M72EKRU3

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/M72EKRU3DDTJPVVBGLHSCG3T6S \
  | 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: 67f445469b18e697d6a132cf211b73f4a4041c4de369f031b418b44b3e99f559

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3c75e97b7e9e3eee4e0552e8efe361b2e82c9d0af2be314d9b3738bb691f230d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2019-04-29T19:57:59Z",
    "title_canon_sha256": "6d10fa33cc904a5069713bd3384e83cf8c1bc98e9366b057e0420b7c3491b9f1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.12927",
    "kind": "arxiv",
    "version": 2
  }
}