Pith Number

pith:IPFMTTHY

pith:2017:IPFMTTHYQJC4OTXZELOBDYU3FI

not attested not anchored not stored refs pending

Variations on a classical theme: On the formal relationship between magnitudes per square arcsecond and luminance

Salvador Bar\'a

arxiv:1710.06755 v1 · 2017-10-18 · astro-ph.IM · 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{IPFMTTHYQJC4OTXZELOBDYU3FI}

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	2026-05-18T00:01:15.294085Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

43cac9ccf88245c74ef922dc11e29b2a04a15950ddb10b4750a6dfbde7206218

Aliases

arxiv: 1710.06755 · arxiv_version: 1710.06755v1 · doi: 10.48550/arxiv.1710.06755 · pith_short_12: IPFMTTHYQJC4 · pith_short_16: IPFMTTHYQJC4OTXZ · pith_short_8: IPFMTTHY

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/IPFMTTHYQJC4OTXZELOBDYU3FI \
  | 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: 43cac9ccf88245c74ef922dc11e29b2a04a15950ddb10b4750a6dfbde7206218

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "732fd37e9ddd6517c02d06d01fbc75dc3f4d98ff55a5bcf539ccb95118590a05",
    "cross_cats_sorted": [
      "physics.optics"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2017-10-18T14:39:49Z",
    "title_canon_sha256": "b03d55f77124829a9b04fc4a31b87af2778ec72e811fa4f4234b2f792c8d9c23"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1710.06755",
    "kind": "arxiv",
    "version": 1
  }
}