Pith Number

pith:NDQ4OUIM

pith:2017:NDQ4OUIM5IGDBMZ37GQIQUM4WK

not attested not anchored not stored refs pending

Cloak Imperfect: Impedance

Paul Kinsler

arxiv:1708.01071 v1 · 2017-08-03 · physics.optics

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NDQ4OUIM5IGDBMZ37GQIQUM4WK}

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	2026-05-18T00:16:56.279701Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

68e1c7510cea0c30b33bf9a088519cb2961a6cc612a74f4a8715dee969c3cfa5

Aliases

arxiv: 1708.01071 · arxiv_version: 1708.01071v1 · doi: 10.48550/arxiv.1708.01071 · pith_short_12: NDQ4OUIM5IGD · pith_short_16: NDQ4OUIM5IGDBMZ3 · pith_short_8: NDQ4OUIM

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/NDQ4OUIM5IGDBMZ37GQIQUM4WK \
  | 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: 68e1c7510cea0c30b33bf9a088519cb2961a6cc612a74f4a8715dee969c3cfa5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "83c5517633b40985d6d0d54847b81f90d2f43241d2aeeddf2a88c27f56d864bd",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.optics",
    "submitted_at": "2017-08-03T09:34:32Z",
    "title_canon_sha256": "4dd805ddc804d709274712f3e40250e7e79dcdee0e35a7f502db600c14b3812f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1708.01071",
    "kind": "arxiv",
    "version": 1
  }
}