Pith Number

pith:VGXDBN2G

pith:2018:VGXDBN2GF2AJHMQBRGBAFS2HHW

not attested not anchored not stored refs pending

The character of the warm ionised medium

Marisa Geyer, Mark Walker

arxiv:1808.07271 v2 · 2018-08-22 · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{VGXDBN2GF2AJHMQBRGBAFS2HHW}

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	2026-07-05T04:18:59.493590Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a9ae30b7462e8093b201898202cb473d9e12cbf6909e3ef6afca153531c8fc3f

Aliases

arxiv: 1808.07271 · arxiv_version: 1808.07271v2 · doi: 10.48550/arxiv.1808.07271 · pith_short_12: VGXDBN2GF2AJ · pith_short_16: VGXDBN2GF2AJHMQB · pith_short_8: VGXDBN2G

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/VGXDBN2GF2AJHMQBRGBAFS2HHW \
  | 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: a9ae30b7462e8093b201898202cb473d9e12cbf6909e3ef6afca153531c8fc3f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0136e5071cc734688c035212c89c2077eb2fd2abbac775caf50fdcbb9159c201",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2018-08-22T08:29:29Z",
    "title_canon_sha256": "dc5af0ce5bc7a90dedd37498368a108ffeae836cba56a746c3078361c263c501"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1808.07271",
    "kind": "arxiv",
    "version": 2
  }
}