Pith Number

pith:IVEMWFNX

pith:2016:IVEMWFNXCQCTC7HCMDOKI3YQ4N

not attested not anchored not stored refs pending

Computability Theory of Closed Timelike Curves

Giulio Gueltrini, Marien Raat, Mohammad Bavarian, Ryan O'Donnell, Sabee Grewal, Scott Aaronson, Toby Cubitt

arxiv:1609.05507 v2 · 2016-09-18 · quant-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{IVEMWFNXCQCTC7HCMDOKI3YQ4N}

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	2026-07-05T09:19:48.961580Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4548cb15b71405317ce260dca46f10e376ff56c5cc5f517488a9b81e6b56798b

Aliases

arxiv: 1609.05507 · arxiv_version: 1609.05507v2 · doi: 10.48550/arxiv.1609.05507 · pith_short_12: IVEMWFNXCQCT · pith_short_16: IVEMWFNXCQCTC7HC · pith_short_8: IVEMWFNX

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/IVEMWFNXCQCTC7HCMDOKI3YQ4N \
  | 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: 4548cb15b71405317ce260dca46f10e376ff56c5cc5f517488a9b81e6b56798b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d25de1bc10e8c23d29d6f7814c0354e78d4c69177cb89bbd248c9302ae985aac",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2016-09-18T16:08:04Z",
    "title_canon_sha256": "376f884d9506ab76ff0fea82a6a77d401bf9531ba9332c636204bfc1d6eb8c90"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1609.05507",
    "kind": "arxiv",
    "version": 2
  }
}