Pith Number

pith:4EFWYDCM

pith:2021:4EFWYDCMURIB3BABYUWZ3QB3EW

not attested not anchored not stored refs pending

A survey of active learning algorithms for supervised remote sensing image classification

Devis Tuia, Jordi Munoz-Mari, Loris Copa, Michele Volpi, Mikhail Kanevski

arxiv:2104.07784 v1 · 2021-04-15 · cs.CV

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4EFWYDCMURIB3BABYUWZ3QB3EW}

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	2026-07-05T02:32:37.664444Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e10b6c0c4ca4501d8401c52d9dc03b2596c717fb8723d0a6c70d044fa0f395bf

Aliases

arxiv: 2104.07784 · arxiv_version: 2104.07784v1 · doi: 10.48550/arxiv.2104.07784 · pith_short_12: 4EFWYDCMURIB · pith_short_16: 4EFWYDCMURIB3BAB · pith_short_8: 4EFWYDCM

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/4EFWYDCMURIB3BABYUWZ3QB3EW \
  | 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: e10b6c0c4ca4501d8401c52d9dc03b2596c717fb8723d0a6c70d044fa0f395bf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "67424089ab679ab82d14915069c4bcd240dc8727e139006b403dac2b9d88e371",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-sa/4.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2021-04-15T21:36:59Z",
    "title_canon_sha256": "4360b79572b6b88d755e7e8659934b3f2441d0680aaac6937c7b60e6ef054feb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2104.07784",
    "kind": "arxiv",
    "version": 1
  }
}