Pith Number

pith:SKTRFT5L

pith:2007:SKTRFT5LRD5AX5SVSACY5USOWT

not attested not anchored not stored refs pending

Quantum gravity computers: On the theory of computation with indefinite causal structure

Lucien Hardy

arxiv:quant-ph/0701019 v1 · 2007-01-05 · quant-ph · gr-qc

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SKTRFT5LRD5AX5SVSACY5USOWT}

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	2026-05-18T01:37:53.609860Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

92a712cfab88fa0bf65590058ed24eb4e256f6f20b45e971a0a14ce90c3e62ed

Aliases

arxiv: quant-ph/0701019 · arxiv_version: quant-ph/0701019v1 · doi: 10.48550/arxiv.quant-ph/0701019 · pith_short_12: SKTRFT5LRD5A · pith_short_16: SKTRFT5LRD5AX5SV · pith_short_8: SKTRFT5L

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/SKTRFT5LRD5AX5SVSACY5USOWT \
  | 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: 92a712cfab88fa0bf65590058ed24eb4e256f6f20b45e971a0a14ce90c3e62ed

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2462ba36ba1b2dbea41bd5410dcc5153f8bc9f0a4ca9cd5512ce0b0fceedb5b0",
    "cross_cats_sorted": [
      "gr-qc"
    ],
    "license": "",
    "primary_cat": "quant-ph",
    "submitted_at": "2007-01-05T10:48:08Z",
    "title_canon_sha256": "0ccc984918dc9e15ebc12d8cb47f29cab91671eb6791edd561761bc431ac7a6a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "quant-ph/0701019",
    "kind": "arxiv",
    "version": 1
  }
}