Pith Number

pith:QSPNKDKT

pith:2015:QSPNKDKTPML33W3ZL5NW375GKC

not attested not anchored not stored refs pending

Interacting galaxies in the nearby Universe: only moderate increase of star formation

2), Johan H. Knapen (1, Mauricio Cisternas (1, Miguel Querejeta (3) ((1) IAC (2) ULL (3) MPIA)

arxiv:1509.05164 v1 · 2015-09-17 · 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{QSPNKDKTPML33W3ZL5NW375GKC}

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	2026-05-18T01:30:17.673168Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

849ed50d537b17bddb795f5b6dffa6508c32ebd53770f4333eb38470b989b245

Aliases

arxiv: 1509.05164 · arxiv_version: 1509.05164v1 · doi: 10.48550/arxiv.1509.05164 · pith_short_12: QSPNKDKTPML3 · pith_short_16: QSPNKDKTPML33W3Z · pith_short_8: QSPNKDKT

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/QSPNKDKTPML33W3ZL5NW375GKC \
  | 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: 849ed50d537b17bddb795f5b6dffa6508c32ebd53770f4333eb38470b989b245

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bbd1e28880ae901754b45ca5c15c9c2d897cc4b258745d4eddeffacfab2bbda0",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2015-09-17T08:49:50Z",
    "title_canon_sha256": "bd6dc113a47c17f5e786f4dfeffba08f4aee28c2d14f2e44a763fc62f23eea94"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1509.05164",
    "kind": "arxiv",
    "version": 1
  }
}