Pith Number

pith:2LDW2MVZ

pith:2019:2LDW2MVZYNYCFUGBNAYABC3VXP

not attested not anchored not stored refs pending

Nostalgin: Extracting 3D City Models from Historical Image Data

Amol Kapoor, Hunter Larco, Raimondas Kiveris

arxiv:1905.01772 v1 · 2019-05-06 · cs.CV · cs.CG · 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{2LDW2MVZYNYCFUGBNAYABC3VXP}

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	2026-05-17T23:46:57.469673Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d2c76d32b9c37022d0c16830008b75bbd85a73b56ef01cc72f841af5388ba4bd

Aliases

arxiv: 1905.01772 · arxiv_version: 1905.01772v1 · doi: 10.48550/arxiv.1905.01772 · pith_short_12: 2LDW2MVZYNYC · pith_short_16: 2LDW2MVZYNYCFUGB · pith_short_8: 2LDW2MVZ

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/2LDW2MVZYNYCFUGBNAYABC3VXP \
  | 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: d2c76d32b9c37022d0c16830008b75bbd85a73b56ef01cc72f841af5388ba4bd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "25abbbae9e9cfe89d73bc87459dabed5a97f154fcb5c34b3b851da74327ee614",
    "cross_cats_sorted": [
      "cs.CG",
      "cs.LG"
    ],
    "license": "http://creativecommons.org/licenses/by-nc-sa/4.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2019-05-06T00:18:15Z",
    "title_canon_sha256": "81641360451c792564f4d54d4780507645de5785785b202b4c951f987fdcc39d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1905.01772",
    "kind": "arxiv",
    "version": 1
  }
}