Pith Number

pith:3NJ4BQXY

pith:2015:3NJ4BQXYT5U3HL6ML2RTZKPR3M

not attested not anchored not stored refs pending

Preprint Virtual Reality Assistant Technology for Learning Primary Geography

Xiaoming Li, Zhihan Lv

arxiv:1509.00159 v2 · 2015-09-01 · 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{3NJ4BQXYT5U3HL6ML2RTZKPR3M}

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	2026-05-18T01:33:51.158967Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

db53c0c2f89f69b3afcc5ea33ca9f1db0127960688cfbc74829ca1757356db0d

Aliases

arxiv: 1509.00159 · arxiv_version: 1509.00159v2 · doi: 10.48550/arxiv.1509.00159 · pith_short_12: 3NJ4BQXYT5U3 · pith_short_16: 3NJ4BQXYT5U3HL6M · pith_short_8: 3NJ4BQXY

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/3NJ4BQXYT5U3HL6ML2RTZKPR3M \
  | 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: db53c0c2f89f69b3afcc5ea33ca9f1db0127960688cfbc74829ca1757356db0d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "feb233148faadd9ec68b13d3a751d086897d597c114ee5d26fe11d87feb91470",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.HC",
    "submitted_at": "2015-09-01T07:03:35Z",
    "title_canon_sha256": "20c39101fefd08a9833dd715e14d67be0189af233178b4ccaf52498b78b801d6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1509.00159",
    "kind": "arxiv",
    "version": 2
  }
}