No, it is not true that Albert Einstein stole the theory of relativity from physicists Lorentz and Poincaré. Albert Einstein independently developed the theory of relativity, and his contributions to physics were original and groundbreaking.
The concept of relativity was not a single discovery but rather a culmination of ideas and efforts by multiple scientists over several decades. Henri Poincaré, a French mathematician and physicist, and Hendrik Lorentz, a Dutch physicist, made significant contributions to the development of the theory of relativity through their work on the Lorentz transformation and the theory of electromagnetic fields.
However, it was Albert Einstein who unified and extended these ideas into what we now know as the theory of special relativity. Einstein published his theory of special relativity in the paper titled "On the Electrodynamics of Moving Bodies" in 1905. In this paper, he introduced the concepts of time dilation, length contraction, and the constancy of the speed of light as the central principles of the theory.
Later, in 1915, Einstein went on to develop the theory of general relativity, which extended the principles of special relativity to include gravity and the curvature of spacetime.
Einstein's theories were groundbreaking and fundamentally changed our understanding of space, time, and gravity. They have been thoroughly tested and validated through numerous experiments and observations. As a result, Einstein is widely regarded as one of the greatest physicists in history, and his contributions to science remain foundational to modern physics. The notion that he stole the theory of relativity from others is a misconception and not supported by historical evidence.