Pith Number

pith:URK5MAG4

pith:2016:URK5MAG43Q4PPX6C3HU3DTP2WJ

not attested not anchored not stored refs pending

H, He-like recombination spectra II: $l$-changing collisions for He Rydberg states

F. Guzm\'an, G. J. Ferland, M. Chatzikos, N. R. Badnell, P. A. M. van Hoof, R. J. R. Williams

arxiv:1608.08947 v1 · 2016-08-31 · astro-ph.CO · astro-ph.GA · physics.atom-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{URK5MAG43Q4PPX6C3HU3DTP2WJ}

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	2026-05-18T01:04:17.550182Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a455d600dcdc38f7dfc2d9e9b1cdfab244f65cd4d7d240759989a03046ecd090

Aliases

arxiv: 1608.08947 · arxiv_version: 1608.08947v1 · doi: 10.48550/arxiv.1608.08947 · pith_short_12: URK5MAG43Q4P · pith_short_16: URK5MAG43Q4PPX6C · pith_short_8: URK5MAG4

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/URK5MAG43Q4PPX6C3HU3DTP2WJ \
  | 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: a455d600dcdc38f7dfc2d9e9b1cdfab244f65cd4d7d240759989a03046ecd090

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "753821453fe94a1d9117da36de106d80f2c8a160f3ae654062dd31940732ea34",
    "cross_cats_sorted": [
      "astro-ph.GA",
      "physics.atom-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2016-08-31T17:12:00Z",
    "title_canon_sha256": "13066667caacefa9281281411f4f98a2378045db79ff7e760c6f150fe39927a6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1608.08947",
    "kind": "arxiv",
    "version": 1
  }
}