Pith Number

pith:UNBNJGKR

pith:2018:UNBNJGKRBQMM77D56U2UBH6Y4P

not attested not anchored not stored refs pending

Recalculation of Astrophysical Opacities: Overview, Methodology and Atomic Calculations

Anil K. Pradhan, Sultana N. Nahar

arxiv:1801.02085 v1 · 2018-01-06 · astro-ph.SR · 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{UNBNJGKRBQMM77D56U2UBH6Y4P}

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	2026-05-18T00:26:34.938857Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a342d499510c18cffc7df535409fd8e3e9ee716717047da6a4e06248de622b44

Aliases

arxiv: 1801.02085 · arxiv_version: 1801.02085v1 · doi: 10.48550/arxiv.1801.02085 · pith_short_12: UNBNJGKRBQMM · pith_short_16: UNBNJGKRBQMM77D5 · pith_short_8: UNBNJGKR

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/UNBNJGKRBQMM77D56U2UBH6Y4P \
  | 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: a342d499510c18cffc7df535409fd8e3e9ee716717047da6a4e06248de622b44

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9f297e0395478d762bf5014bb8d60f3b90f52b7fab1df99d02a1aebb7c4d93f9",
    "cross_cats_sorted": [
      "physics.atom-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2018-01-06T20:31:26Z",
    "title_canon_sha256": "953b9bfbbd7dd09a1acacf24f36a46c52ba67bfe2d88cdd83f4c13c8bdf49c5b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1801.02085",
    "kind": "arxiv",
    "version": 1
  }
}