Pith Number

pith:PT2CMZ3R

pith:2025:PT2CMZ3RTYXDI3AXTCUG6SMLPH

not attested not anchored not stored refs pending

Count2Density: Crowd Density Estimation without Location-level Annotations

Feng Chen, Mario Valerio Giuffrida, Mattia Litrico, Michael Pound, Sebastiano Battiato, Sotirios A Tsaftaris

arxiv:2509.03170 v1 · 2025-09-03 · cs.CV · cs.LG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PT2CMZ3RTYXDI3AXTCUG6SMLPH}

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	2026-07-05T12:04:05.431230Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7cf42667719e2e346c1798a86f498b79d68a821aefd7a3902b50c5d41e0e7223

Aliases

arxiv: 2509.03170 · arxiv_version: 2509.03170v1 · doi: 10.48550/arxiv.2509.03170 · pith_short_12: PT2CMZ3RTYXD · pith_short_16: PT2CMZ3RTYXDI3AX · pith_short_8: PT2CMZ3R

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/PT2CMZ3RTYXDI3AXTCUG6SMLPH \
  | 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: 7cf42667719e2e346c1798a86f498b79d68a821aefd7a3902b50c5d41e0e7223

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0234e47bdb6ffebd7e8d1f6764fbebc743db99e98257416e86f5a7d0d658e1d6",
    "cross_cats_sorted": [
      "cs.LG"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2025-09-03T09:36:34Z",
    "title_canon_sha256": "abe6daf6598e3886e2b281e0df08ec2667377f7dcbc35d6924aad41cfb3b0bda"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2509.03170",
    "kind": "arxiv",
    "version": 1
  }
}