)

var threeOnce struct {
	sync.Once
	v *Float
}

func three() *Float {
	threeOnce.Do(func() {
		threeOnce.v = NewFloat(3.0)
	})
	return threeOnce.v
}

// Sqrt sets z to the rounded square root of x, and returns it.
//
// If z's precision is 0, it is changed to x's precision before the
// operation. Rounding is performed according to z's precision and

  auto q0 = FIFOQueue(root.WithOpName(kQueueName), {DataType::DT_FLOAT});
  Output rnd = RandomNormal(root.WithOpName("rnd"), {1, 1}, DataType::DT_FLOAT);
  Output square = Square(root.WithOpName(kSquareOpName), rnd);
  auto enqueue0 = QueueEnqueue(root.WithOpName(kEnqueueOp0), q0, {square});
  auto close0 = QueueClose(root.WithOpName(kCloseOp0), q0);
  auto cancel0 = QueueClose(root.WithOpName(kCancelOp0), q0,

      list {
        s: "loc:@training/SGD/gradients/AddN_11"
      }
    }
  }
}
node {
  name: "loss_1/res5a_branch1/kernel/Regularizer/Square"
  op: "Square"
  input: "loss_1/res5a_branch1/kernel/Regularizer/Square/ReadVariableOp"
  device: "/job:localhost/replica:0/task:0/device:GPU:0"
  attr {
    key: "T"
    value {
      type: DT_FLOAT
    }
  }
}

   * https://github.com/square/okhttp/issues/5667
   */
  @Test
  fun hostToUriStripsCharacters() {
    val httpUrl = "http://example\".com/".toHttpUrl()
    assertThat(httpUrl.toUri().toString()).isEqualTo("http://example.com/")
  }

  /** Confirm that URI retains other characters. https://github.com/square/okhttp/issues/5236 */
  @Test
  fun hostToUriStripsCharacters2() {

/*
 * Copyright (C) 2014 Square, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,

  input: "loss_1/fc1000/bias/Regularizer/Square/ReadVariableOp"
  input: "training/LossScaleOptimizer/gradients/loss_1/fc1000/bias/Regularizer/Square_grad/Mul"
  device: "/job:localhost/replica:0/task:0/device:GPU:0"
  attr {
    key: "T"
    value {
      type: DT_FLOAT
    }
  }
}
node {
  name: "loss_1/fc1000/bias/Regularizer/Square"
  op: "Square"

/*
 * Copyright (C) 2020 Square, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,

/*
 * Copyright (C) 2020 Square, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,

var I = NewIdentityPoint()

func checkOnCurve(t *testing.T, points ...*Point) {
	t.Helper()
	for i, p := range points {
		var XX, YY, ZZ, ZZZZ field.Element
		XX.Square(&p.x)
		YY.Square(&p.y)
		ZZ.Square(&p.z)
		ZZZZ.Square(&ZZ)
		// -x² + y² = 1 + dx²y²
		// -(X/Z)² + (Y/Z)² = 1 + d(X/Z)²(Y/Z)²
		// (-X² + Y²)/Z² = 1 + (dX²Y²)/Z⁴
		// (-X² + Y²)*Z² = Z⁴ + dX²Y²
		var lhs, rhs field.Element

/*
 * Copyright (C) 2012 Square, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,