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   "source": [
    "# Constraint *LexDecreasing*"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "d1492fdb",
   "metadata": {},
   "source": [
    "The constraint *Decreasing* can be naturally lifted to lists, by considering the so-called *lexicographic order*: it is then called *LexDecreasing* and ensures that the tuple formed by the values assigned to the variables of a first list is lexicographically greater than (or equal to) the tuple formed by the values assigned to the variables of a second  list. "
   ]
  },
  {
   "cell_type": "markdown",
   "id": "672d35ee",
   "metadata": {},
   "source": [
    "As this constraint is totally symmetric to constraint *LexIncreasing*, we invite the reader to see the page concerning it."
   ]
  }
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