Pith Number

pith:3B5TQSUX

pith:2017:3B5TQSUXJFNZ7BZUZS6LC4LMZ5

not attested not anchored not stored refs pending

Optical Companding

Bahram Jalali, Yunshan Jiang

arxiv:1801.00007 v1 · 2017-12-29 · 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{3B5TQSUXJFNZ7BZUZS6LC4LMZ5}

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	2026-05-18T00:26:59.786931Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d87b384a97495b9f8734ccbcb1716ccf68b0102e544c60e7574bd23ba601cca0

Aliases

arxiv: 1801.00007 · arxiv_version: 1801.00007v1 · doi: 10.48550/arxiv.1801.00007 · pith_short_12: 3B5TQSUXJFNZ · pith_short_16: 3B5TQSUXJFNZ7BZU · pith_short_8: 3B5TQSUX

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/3B5TQSUXJFNZ7BZUZS6LC4LMZ5 \
  | 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: d87b384a97495b9f8734ccbcb1716ccf68b0102e544c60e7574bd23ba601cca0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0bd04e6535895069ee74d0816202c3bf7b32cdb54de93617a54fe4214649a592",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.optics",
    "submitted_at": "2017-12-29T18:20:13Z",
    "title_canon_sha256": "a4a8b249282f2d4aeab3067de5325794f7fe4570baafa0fbcbf1a81c42ba4a9f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1801.00007",
    "kind": "arxiv",
    "version": 1
  }
}