Pith Number

pith:KEKFBXTG

pith:2012:KEKFBXTGOWT4SQ2OAIQSJHG23Q

not attested not anchored not stored refs pending

The true colours of white light: hands-on optical spectrometry

Robert Fischer

arxiv:1204.6072 v1 · 2012-04-26 · physics.ed-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{KEKFBXTGOWT4SQ2OAIQSJHG23Q}

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	2026-05-18T03:56:47.154522Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

511450de6675a7c9434e0221249cdadc03e9117a9ab95e1f20f7fee13750754a

Aliases

arxiv: 1204.6072 · arxiv_version: 1204.6072v1 · doi: 10.48550/arxiv.1204.6072 · pith_short_12: KEKFBXTGOWT4 · pith_short_16: KEKFBXTGOWT4SQ2O · pith_short_8: KEKFBXTG

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/KEKFBXTGOWT4SQ2OAIQSJHG23Q \
  | 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: 511450de6675a7c9434e0221249cdadc03e9117a9ab95e1f20f7fee13750754a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "59326ae25f57177ad7d796e51cd12768cca9b32f9224771bafe3fa7c89e5b8fc",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.ed-ph",
    "submitted_at": "2012-04-26T22:57:25Z",
    "title_canon_sha256": "95060697ffdcd8033f06aaff22fe2d98a2267f77c21ec1763ade2726d4f868f5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1204.6072",
    "kind": "arxiv",
    "version": 1
  }
}