Pith Number

pith:2HMHUFKW

pith:2011:2HMHUFKWYSRFIIJZIHNBGWTIPX

not attested not anchored not stored refs pending

UPAL: Unbiased Pool Based Active Learning

Alexander Gray, Ravi Ganti

arxiv:1111.1784 v2 · 2011-11-08 · stat.ML · cs.AI · 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{2HMHUFKWYSRFIIJZIHNBGWTIPX}

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	2026-05-18T04:08:23.613661Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d1d87a1556c4a254213941da135a687deb2226be7024b35757cc1bd27d7b0db3

Aliases

arxiv: 1111.1784 · arxiv_version: 1111.1784v2 · doi: 10.48550/arxiv.1111.1784 · pith_short_12: 2HMHUFKWYSRF · pith_short_16: 2HMHUFKWYSRFIIJZ · pith_short_8: 2HMHUFKW

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/2HMHUFKWYSRFIIJZIHNBGWTIPX \
  | 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: d1d87a1556c4a254213941da135a687deb2226be7024b35757cc1bd27d7b0db3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5a31af1f690883cf8e0ab44350a5e5af895cfd19ebc707eaf93e90da021a49e2",
    "cross_cats_sorted": [
      "cs.AI",
      "cs.LG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.ML",
    "submitted_at": "2011-11-08T02:41:48Z",
    "title_canon_sha256": "aeb305d5f5957f465762920dd10af15b43e680964af10da16998c4a177f918d9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1111.1784",
    "kind": "arxiv",
    "version": 2
  }
}