Response from ChatGPT Exploring the Lorentz Transformation of Mass-Energy: Insights from a ChatGPT Session [8] .

Yes, you are correct. In his book “Einstein’s Legacy: The Unity of Space and Time”, Julian Schwinger discusses the Lorentz transformation and its consequences, including mass increase, which is also known as relativistic mass.

As an object’s velocity (v) approaches the speed of light (c), its relativistic mass (m_r) increases according to the formula:

m_r = m₀ * γ,

where m₀ is the object’s rest mass, and γ is the Lorentz factor. As discussed earlier, the Lorentz factor (γ) is given by:

γ = 1/ sqrt(1 − v²/c²).