Pith Number

pith:BVVRGA43

pith:2004:BVVRGA43V3J5IZVCGSPYIUXTMO

not attested not anchored not stored refs pending

The Measurement Calculus

Elham Kashefi, Prakash Panangaden, Vincent Danos

arxiv:quant-ph/0412135 v1 · 2004-12-17 · 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{BVVRGA43V3J5IZVCGSPYIUXTMO}

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	2026-07-04T14:46:53.192292Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0d6b13039baed3d466a2349f8452f363b97aadde3d192cc6b268f37c8417f621

Aliases

arxiv: quant-ph/0412135 · arxiv_version: quant-ph/0412135v1 · doi: 10.48550/arxiv.quant-ph/0412135 · pith_short_12: BVVRGA43V3J5 · pith_short_16: BVVRGA43V3J5IZVC · pith_short_8: BVVRGA43

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/BVVRGA43V3J5IZVCGSPYIUXTMO \
  | 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: 0d6b13039baed3d466a2349f8452f363b97aadde3d192cc6b268f37c8417f621

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "26ba9584d3c477a559f19a4916bd9d134a4aede28b9a9ae55ccfb8010df9aae6",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "quant-ph",
    "submitted_at": "2004-12-17T02:45:10Z",
    "title_canon_sha256": "555bc7bcdb68bc250c8be0a14024f30337a3fcc41878feb8805a0b03308c6984"
  },
  "schema_version": "1.0",
  "source": {
    "id": "quant-ph/0412135",
    "kind": "arxiv",
    "version": 1
  }
}