Pith Number

pith:2EQT7JLB

pith:2015:2EQT7JLBCGTL2XMCC73FFN3UJ3

not attested not anchored not stored refs pending

Various stability estimates for the problem of determining an initial heat distribution from a single measurement

Mourad Choulli

arxiv:1512.07421 v1 · 2015-12-23 · math.AP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2EQT7JLBCGTL2XMCC73FFN3UJ3}

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	2026-05-18T01:23:49.719239Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d1213fa56111a6bd5d8217f652b7744ece3b4e9d9b41c048924232d02a42fb4f

Aliases

arxiv: 1512.07421 · arxiv_version: 1512.07421v1 · doi: 10.48550/arxiv.1512.07421 · pith_short_12: 2EQT7JLBCGTL · pith_short_16: 2EQT7JLBCGTL2XMC · pith_short_8: 2EQT7JLB

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/2EQT7JLBCGTL2XMCC73FFN3UJ3 \
  | 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: d1213fa56111a6bd5d8217f652b7744ece3b4e9d9b41c048924232d02a42fb4f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "10b8ed79f84e45cb15f9be22e81c6b91b89bcdae7a5d3cc181d6baf0eada23d4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2015-12-23T10:28:28Z",
    "title_canon_sha256": "7882c1eef62bccd0f16e95401043e8f670c18b7e5e03ed0ce217a27b2d5855ea"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1512.07421",
    "kind": "arxiv",
    "version": 1
  }
}