()
| 1946 | return true |
| 1947 | } |
| 1948 | ln() { |
| 1949 | const a = this.a |
| 1950 | const b = this.b |
| 1951 | |
| 1952 | const asbs = a.times(a).plus(b.times(b)) |
| 1953 | const log = this.t.ln(asbs) |
| 1954 | const half = log.div(2) |
| 1955 | |
| 1956 | this.b = this.arg() |
| 1957 | this.a = half |
| 1958 | |
| 1959 | return this |
| 1960 | } |
| 1961 | log(base) { |
| 1962 | if (!base) { |
| 1963 | throw "[TheoremJS] Log: wrong base" |