Pith Number

pith:DDDJQHUL

pith:2020:DDDJQHUL2MULXYLSI66KZTSPDX

not attested not anchored not stored refs pending

Spectroscopic evolution of massive stars near the main sequence at low metallicity

A. Palacios (LUPM, CNRS & Montpellier University), F. Martins

arxiv:2010.13430 v1 · 2020-10-26 · astro-ph.SR

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{DDDJQHUL2MULXYLSI66KZTSPDX}

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	2026-07-05T02:06:16.368518Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

18c6981e8bd328bbe17247bcacce4f1dc121f64d10466cc2f17de8758a471d97

Aliases

arxiv: 2010.13430 · arxiv_version: 2010.13430v1 · doi: 10.48550/arxiv.2010.13430 · pith_short_12: DDDJQHUL2MUL · pith_short_16: DDDJQHUL2MULXYLS · pith_short_8: DDDJQHUL

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/DDDJQHUL2MULXYLSI66KZTSPDX \
  | 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: 18c6981e8bd328bbe17247bcacce4f1dc121f64d10466cc2f17de8758a471d97

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a7eb5d0b3eb04e25f9036ee8e0a18b7ffaaa05ed38fd69a8c769b4bc033d8c79",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2020-10-26T08:57:02Z",
    "title_canon_sha256": "508b0dabdb64984f046d7a63873cfd3d1f1d554dead788d6a5be672f65e5751f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2010.13430",
    "kind": "arxiv",
    "version": 1
  }
}