Pith Number

pith:VRGG6FJ2

pith:2019:VRGG6FJ2OK5HH47CKZTB6TKNR7

not attested not anchored not stored refs pending

Shadow Accrual Maps: Efficient Accumulation of City-Scale Shadows Over Time

Claudio T. Silva, Fabio Miranda, Harish Doraiswamy, Luc Wilson, Marcos Lage, Mondrian Hsieh

arxiv:1907.04435 v1 · 2019-07-09 · cs.GR · cs.CY · cs.HC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{VRGG6FJ2OK5HH47CKZTB6TKNR7}

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	2026-05-17T23:41:01.730036Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ac4c6f153a72ba73f3e256661f4d4d8fc7e77057cc30ae63bfd0c65e2b58402e

Aliases

arxiv: 1907.04435 · arxiv_version: 1907.04435v1 · doi: 10.48550/arxiv.1907.04435 · pith_short_12: VRGG6FJ2OK5H · pith_short_16: VRGG6FJ2OK5HH47C · pith_short_8: VRGG6FJ2

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/VRGG6FJ2OK5HH47CKZTB6TKNR7 \
  | 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: ac4c6f153a72ba73f3e256661f4d4d8fc7e77057cc30ae63bfd0c65e2b58402e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4e5aecdc5022b88e8edeaeb5214ee1f4b912a8d913ff8c8e06cace253bec6e14",
    "cross_cats_sorted": [
      "cs.CY",
      "cs.HC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.GR",
    "submitted_at": "2019-07-09T22:03:40Z",
    "title_canon_sha256": "ffb53301e374b039f553b880ee493293c3253b030bfb83c61dc4945f229597b8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1907.04435",
    "kind": "arxiv",
    "version": 1
  }
}