Pith Number

pith:C42YQUJK

pith:2017:C42YQUJK2KKLEHXO2J4H7YPCSK

not attested not anchored not stored refs pending

qTorch: The Quantum Tensor Contraction Handler

Al\'an Aspuru-Guzik, E. Schuyler Fried, Ian D. Kivlichan, Jhonathan Romero, Nicolas P. D. Sawaya, Yudong Cao

arxiv:1709.03636 v2 · 2017-09-12 · quant-ph · cs.MS

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{C42YQUJK2KKLEHXO2J4H7YPCSK}

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	2026-05-17T23:57:32.644320Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

173588512ad294b21eeed2787fe1e292a939eb5fd9ebaa52dfa2e9f2793d5e88

Aliases

arxiv: 1709.03636 · arxiv_version: 1709.03636v2 · doi: 10.48550/arxiv.1709.03636 · pith_short_12: C42YQUJK2KKL · pith_short_16: C42YQUJK2KKLEHXO · pith_short_8: C42YQUJK

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/C42YQUJK2KKLEHXO2J4H7YPCSK \
  | 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: 173588512ad294b21eeed2787fe1e292a939eb5fd9ebaa52dfa2e9f2793d5e88

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "35091f8e1066231dd53bd34c042293db7979757db07b72b23960ac4e111db223",
    "cross_cats_sorted": [
      "cs.MS"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2017-09-12T00:56:22Z",
    "title_canon_sha256": "54127deb34d901227d1b8b44df802ad0e52a33b7b498540b101b04a719f373a9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1709.03636",
    "kind": "arxiv",
    "version": 2
  }
}