Pith Number

pith:DJFSQZXB

pith:2020:DJFSQZXB5UPR345VRZUDA5DZ5J

not attested not anchored not stored refs pending

Reversible dynamics with closed time-like curves and freedom of choice

Fabio Costa, Germain Tobar

arxiv:2001.02511 v3 · 2020-01-07 · 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{DJFSQZXB5UPR345VRZUDA5DZ5J}

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	2026-05-26T01:03:06.817226Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1a4b2866e1ed1f1df3b58e68307479ea6b3d2abaa37ddcbd1893c474d26ec6aa

Aliases

arxiv: 2001.02511 · arxiv_version: 2001.02511v3 · doi: 10.48550/arxiv.2001.02511 · pith_short_12: DJFSQZXB5UPR · pith_short_16: DJFSQZXB5UPR345V · pith_short_8: DJFSQZXB

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/DJFSQZXB5UPR345VRZUDA5DZ5J \
  | 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: 1a4b2866e1ed1f1df3b58e68307479ea6b3d2abaa37ddcbd1893c474d26ec6aa

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "34e73e66a006946a9b7745691598f391527bf48ddb1b6b80dc9593e90b91139f",
    "cross_cats_sorted": [
      "gr-qc"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2020-01-07T08:24:29Z",
    "title_canon_sha256": "f8b28e1f0416a238bfde234f6805684fd72a5e4d589f0aa7f4b7164c7c1eebc6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2001.02511",
    "kind": "arxiv",
    "version": 3
  }
}