BiMap<V, K> inv = getMap().inverse();
    inv.keySet().clear();
    assertTrue(getMap().isEmpty());
    assertTrue(inv.isEmpty());
  }

  @MapFeature.Require(SUPPORTS_REMOVE)
  public void testClearInverseValuesClears() {
    BiMap<V, K> inv = getMap().inverse();
    inv.values().clear();
    assertTrue(getMap().isEmpty());
    assertTrue(inv.isEmpty());
  }

    BiMap<V, K> inv = getMap().inverse();
    inv.keySet().clear();
    assertTrue(getMap().isEmpty());
    assertTrue(inv.isEmpty());
  }

  @MapFeature.Require(SUPPORTS_REMOVE)
  public void testClearInverseValuesClears() {
    BiMap<V, K> inv = getMap().inverse();
    inv.values().clear();
    assertTrue(getMap().isEmpty());
    assertTrue(inv.isEmpty());
  }

		t.Error("unexpected output for inv(1)")
	}
	new(big.Int).Add(N, big.NewInt(1)).FillBytes(input)
	out, err = nistec.P256OrdInverse(input)
	if err != nil {
		t.Fatal(err)
	}
	if !bytes.Equal(out, exp) {
		t.Error("unexpected output for inv(N+1)")
	}

	// Check inv(20) and inv(N+20) against math/big
	exp = new(big.Int).ModInverse(big.NewInt(20), N).FillBytes(make([]byte, 32))
	big.NewInt(20).FillBytes(input)

	one := Element{1, 0, 0, 0, 0}
	var xinv, r Element

	xinv.Invert(&x)
	r.Multiply(&x, &xinv)
	r.reduce()

	if one != r {
		t.Errorf("inversion identity failed, got: %x", r)
	}

	var bytes [32]byte

	_, err := io.ReadFull(rand.Reader, bytes[:])
	if err != nil {
		t.Fatal(err)
	}
	x.SetBytes(bytes[:])

	xinv.Invert(&x)
	r.Multiply(&x, &xinv)
	r.reduce()

	if one != r {

    for (Entry<K, V> entry : entries) {
      Entry<V, K> reversed = reverseEntry(entry);
      BiMap<V, K> inv = getMap().inverse();
      assertFalse(
          "Inverse should not contain entry " + reversed, inv.entrySet().contains(reversed));
      assertFalse(
          "Inverse should not contain key " + reversed.getKey(),
          inv.containsKey(reversed.getKey()));
      assertFalse(

	z.s = 1 - z.hinv(z.h(1.5)-math.Exp(-z.q*math.Log(z.v+1.0)))
	return z
}

// Uint64 returns a value drawn from the Zipf distribution described
// by the Zipf object.
func (z *Zipf) Uint64() uint64 {
	if z == nil {
		panic("rand: nil Zipf")
	}
	k := 0.0

	for {
		r := z.r.Float64() // r on [0,1]
		ur := z.hxm + r*z.hx0minusHxm
		x := z.hinv(ur)
		k = math.Floor(x + 0.5)

}

func (p *P384Point) bytes(out *[1 + 2*p384ElementLength]byte) []byte {
	if p.z.IsZero() == 1 {
		return append(out[:0], 0)
	}

	zinv := new(fiat.P384Element).Invert(p.z)
	x := new(fiat.P384Element).Mul(p.x, zinv)
	y := new(fiat.P384Element).Mul(p.y, zinv)

	buf := append(out[:0], 4)
	buf = append(buf, x.Bytes()...)
	buf = append(buf, y.Bytes()...)
	return buf
}

}

func (p *P224Point) bytes(out *[1 + 2*p224ElementLength]byte) []byte {
	if p.z.IsZero() == 1 {
		return append(out[:0], 0)
	}

	zinv := new(fiat.P224Element).Invert(p.z)
	x := new(fiat.P224Element).Mul(p.x, zinv)
	y := new(fiat.P224Element).Mul(p.y, zinv)

	buf := append(out[:0], 4)
	buf = append(buf, x.Bytes()...)
	buf = append(buf, y.Bytes()...)
	return buf
}

}

func (p *P521Point) bytes(out *[1 + 2*p521ElementLength]byte) []byte {
	if p.z.IsZero() == 1 {
		return append(out[:0], 0)
	}

	zinv := new(fiat.P521Element).Invert(p.z)
	x := new(fiat.P521Element).Mul(p.x, zinv)
	y := new(fiat.P521Element).Mul(p.y, zinv)

	buf := append(out[:0], 4)
	buf = append(buf, x.Bytes()...)
	buf = append(buf, y.Bytes()...)
	return buf
}

    for (Entry<K, V> entry : entries) {
      Entry<V, K> reversed = reverseEntry(entry);
      BiMap<V, K> inv = getMap().inverse();
      assertFalse(
          "Inverse should not contain entry " + reversed, inv.entrySet().contains(reversed));
      assertFalse(
          "Inverse should not contain key " + reversed.getKey(),
          inv.containsKey(reversed.getKey()));
      assertFalse(